Chapter 7 Telecommunications, the Internet, and Wireless

Technology
Anytime, anywhere, anyway, is the mantra of many computer users. Improved telecommunications
technologies, the process of electronically communicating information, are making it possible.

Looking for an example of how much this revolution is touching every aspect of how we work, live,
play, and learn? Look no further than this page – you wouldn’t be reading this if it weren’t for
telecommunication networks!

7-1 What are the principal components of telecommunications networks

and key networking technologies?
This section shows you how these networks are actually constructed and discusses the various elements
involved in connecting all these computers. Knowing how it all works can give you insight into the
changes that have taken place and an idea of what the future holds. You can also get ideas about how
you can take advantage of the future now!

Networking and Communication Trends

For the most part, all of us have grown up with separate service providers and networks for our land-
based telephones, cellular phones, and computers. We’ve been used to the idea that television cable
service was separate from landline telephone service. Radio was separate albeit free. Cellular telephone
services were separated from all of them. Now all of these telecommunication services are converging
on the Internet and either blurring or destroying the lines of demarcation. It will become harder to
determine where one ends and another starts as high-speed broadband network connections continue to
expand and companies continue to develop products that meet consumer demands.

“The need for broadband access has made satellite and the fiber optic cables, the two high
bandwidth transmission media of choice in today’s telecommunications services. Fiber
optic cables provide a high transmission capacity; it provides broad bandwidth and
capacity to transmit all forms of communication (voice, data, and video). A fiber-optic
connection is faster than wireless by many orders of magnitude. A single optical fiber can
carry about 3 trillion bits per second (bps). The fastest wireless service (fixed wireless
access) approaches 2 million bps. So, fiber optics can be more than a million times
faster.” (http://cbdd.wsu.edu/kewlcontent/cdoutput/TR501/page26.htm.)

What Is a Computer Network?

Before we go much further, let’s make sure you understand how computer networks are configured.
Figure 7.1 shows a simple network structure.

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Figure 7.1: Components of a Simple Computer Network

What you should keep in mind is that you can continually add components to this kind of network and
expand it exponentially. You can take a simple desktop computer and by way of a Network Interface
Card (NIC), incorporate it into an existing network. To share network resources such as printers, and to
route communications on a L AN, requires special software called a network operating system (NOS).
Hubs and switches help route traffic on the network to the right computing device. When two or more
networks are connected to each other, you need a router that sends data transmissions to the correct
network device. Very large networks may require multiple routers so transmissions flow more quickly.

Because of the ever-growing complexity of networks, a new approach is available for managing their
configurations called software-defined networking (S DN). Network administrators use the software
installed on inexpensive commodity servers to manage traffic loads in a more flexible and efficient way.

Networks in Large Companies

Compare Figure 7.1 above that diagrams a simple computer network to Figure 7.2 below that diagrams a
corporate network infrastructure. You’ll see that the network you might use in a large company isn’t all
that different from what you might use in your home. Obviously there will be more computing devices
and servers but basically you’ll have the same network infrastructure.

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Figure 7.2: Corporate Network Infrastructure

Most corporations, large or small, will use a combination of public and private transmission mediums,
including networks built separately for voice communication and computer transactions. Slowly, the
separate networks are converging into one network that can transmit any type of data generated by any
type of device.

Key Digital Networking Technologies

Let’s look at three key technologies necessary for network computing.

Client/Server Computing

The client/server network facilitates computing on all kinds of networks including the Internet. Instead
of one huge mainframe with individual nodes, smaller computers called servers connect to many clients.
This type of network is ideal for companies that are continually expanding their networks or replacing
hardware components.

Packet Switching

Think about going to the grocery store and buying a week’s worth of food. For some of us, that may be
20 packages of Ramen noodles; for others that could be quite a bit of food. You buy all the things, load
them all into your cart, and head for the checkout line. You pay for your food while it’s being bagged.
Assuming you bought lots of items, not all of them are packed into the same bag. You might have four
or five bags, maybe more. You take them home, unpack the bags, and reassemble all your goods in the
cupboard. You’ve just experienced packet switching.

Packet switching is a method of breaking large blocks of data into smaller chunks and routing them in
the most economical way through whichever communication channel is available.

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When you access this lecture file on the web, it appears as though all the data came into your client
computer together. But they didn’t. The data were broken into small packets on their way out of the
server computer and then sent to and reassembled on the client computer. It happens so quickly and so
efficiently that you don’t even notice. Packet switching also checks for transmission errors when data
travel from one location to another.

TCP/IP and Connectivity

How does your Internet Service Provider manage to send your email to the right place? We’re talking
millions and millions of people sending email and using the World Wide Web every day. How do you
keep from getting Mary’s email intended for Billy in Atlanta? Notice that each computer user connected
to a network has a separate, individual address. No two addresses are exactly the same. All of these
addresses are stored on various computers placed around the networks. Software stored on routers uses
these addresses to route the data to the right location. Routers use protocols to help route data around
the many networks to get them to their correct destination.

The most popular model for connecting networks is the Transmission Control Protocol/Internet
Protocol (TCP/IP). Even though this protocol was originally created for what we now call the Internet,
it is easily transferred to networks of all sizes. It provides the easiest methodology for communicating
between computers through standardized protocols that ignore the hardware and software platforms of
the individual pieces of equipment.

Companies can create web-based interfaces for different databases for data input/output and accessing
information without actually combining the data physically in one huge computer. They do so by using
TCP/IP models. With these protocols, they can reduce the disruption to the organization and decrease
the overall costs of adding to their network.

This diagram shows you how TCP/IP works.

Figure 7.4: The Transmission Control Protocol TCP/IP Reference Model

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The most important benefit of the T CP/IP model is that it allows two computers to communicate even if
they are based on different hardware and software platforms.

Bottom Line: All computer networks are basically the same. Many small networks can be
connected to form larger networks, which in turn can be connected to the Internet. Protocols are
the rules used in networks to ensure that transmissions can pass between the various components.
The world of telecommunications and networking has changed drastically over the last ten years.
If the pundits and experts are correct, and there’s no reason to believe they aren’t, we haven’t
seen anything yet!

7-2 What are the different types of networks?

It’s likely that as a company grows, so will its networking needs and capabilities.

Signals: Digital vs. Analog

Everything going into a computer system must be transformed into the digital signals of the computer.
That is, a computer understands only zeros and ones. However, in the networking world much of the
data are transmitted over telephone lines. These lines don’t recognize zeros and ones. They only
understand what are called analog signals – continuous waveform signals. To change the signals back
and forth between analog and digital transmission methods, you need a modem.

Types of Networks

There are many different types of networks that organizations can use to connect their employees,
managers, customers, suppliers, and business partners. It’s important that the right one is used.

Local Area Networks

The local area network (LAN) is probably the most common network setup. You can have as few as
two computers or as many as you can possibly wire together in the local area. Other devices such as
printers and even network-enabled pianos can be a part of a L AN. You can set up a LAN for local area
processing within your company and then connect it to a larger outside network that could be linked to
distant locations.

Many small businesses choose to forego a client/server network architecture in favor of a peer-to-peer
network in which all the computers on the network are equal. Data on one computer can be accessed
easily by any other computer. Setting up a small network with this configuration saves the cost of having
a separate server computer.

Metropolitan and Wide Area Networks

A wide area network (WAN) is basically the same thing as a L AN, only for a broader geographic
setting. This network is not limited by space and distance, and W ANs use a combination of technologies
to connect all the distant locations. A W AN may take on a derivative name such as MAN
(metropolitan area network) simply to describe its physical location.

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Transmission Media and Transmission Speed

Some experts call us a wired nation. If you consider all the methods we use to communicate, we should
be referred to as a wireless nation. Our paging systems and cellular telephones use microwave and
satellite technologies to transmit our voice and data communications from one place to another. We have
cell phones, personal communication services (P CS), mobile data networks, and personal digital
assistants (PDAs) to help us compute on the go. Now when people say they are “going to the office,” it
could just as well be their car or truck!

All the transmission channels discussed in this section combine to give you what seems to be a single
clear channel from one physical location to another physical location. In fact, it is very likely that when
you access the Internet and call up a website, you are using a combination of twisted pair wire, fiber-
optic cable, microwave stations, and satellites to transmit data from your computer to another computer.

Table 7.2 provides a description and speed of each type of transmission medium you may use when
communicating from one point to another.

Bandwidth: Transmission Speed

When you transmit the latest information from a website to your personal computer, the speed at which
it moves across all the transmission media is measured in bits per second (B PS). The speed at which the
bits are transmitted in each cycle is referred to as hertz. If you transmit one million bits in each cycle,
you would call that rate megahertz (one million bits per a single cycle). The bandwidth of a
communication channel is measured by the difference between the highest and lowest frequencies that
can be transmitted by that channel.

Bottom Line: Communication channels consist of wired and wireless media. Processors and
software are combined with the protocols and transmission media to form a network. There are
many different types of network infrastructure configurations. The one that is best for your

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organization depends on your situation. Many new network services are being introduced to
increase the speed of network access and will probably reach your world in the next few years.

7-3 How do the Internet and Internet technology work, and how do
they support communication and e-business?
The latest research numbers from the Pew Internet and American Life website show that 88 percent of
American adults (including 99 percent of Americans age 18 to 29) use the Internet. (Pew Internet and
American Life website, http://www.pewinternet.org January 2016) That number is up from 85 percent
just three years ago.

Try picking up a newspaper or magazine, listening to the radio or television, or simply talking to people,
and you’ll be hard-pressed not to hear something about the Internet and how it’s changing businesses
and the way people buy and sell items.

What is the Internet?

The Internet was developed in 1969 for the U.S. military and eventually spread to universities and
civilian researchers. Because of its open structure, interest in its use began to grow beyond these
exclusive groups. Internetworking is the idea that computer networks are connected to other networks
allowing data to flow freely.

The Internet is best described by what it doesn’t have. There is:

 No single computer
 No single control source
 No single owner
 No single entry point
 No single type of application

The Internet consists of computer networks spread all over the world, through wired and wireless
transmission media, which contain software codes that allow them to talk to each other. That’s it. If you
tried to find a single “front door” to the Internet, you’d be looking for a long, long time.

Small businesses and individuals connect to the Internet through Internet Service Providers (I SP),
such as Earthlink or CoxMedia. In many areas, the I SP is a small local company connected to a larger
network. With recent mergers in the entertainment and Internet industries, some cable T V companies
like Time Warner may serve as the I SP for home users.

One way of physically connecting to the Internet is with a Digital Subscriber Line (DSL). It uses
regular telephone lines to carry both voice and data transmissions at very high speeds.

Since many home computer users already have cable T V installed in their homes, the
telecommunications industry is using cable Internet connections to pump data into the home. If you
have many people on the same cable line, each individual accessing the line will notice progressively
slower speeds as the number of users increases. It is much faster than a dial-up modem, though.

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Larger organizations, such as universities and corporations, can afford a T1 line, which supports
extremely high rates of data transmission. These lines are capable of carrying voice and data
transmissions over 24 channels, which make them ideal for larger networks. Because they are expensive,
it’s not something you’d install in your home.

Internet Addressing and Architecture

Every address used on the Internet, whether it’s an email address or a website address, is nothing more
than a series of numbers called an Internet Protocol address or IP for short. Computers spread out
around the Internet and various networks convert the series of numbers such as 195.128.15.11 to an
easily read address such as www.usatoday.com.

The Domain Name System

The Domain Name System was devised because it’s much easier for people to read letters and words
than to work with series of numbers. The D NS uses a hierarchical breakdown of addresses as Figure 7.6
shows.

Figure 7.6: The Domain Name System

Domain names used in email addresses and website addresses are easily obtained through several
services such as www.networksolutions.com and www.register.com. How do you get a domain name?
Be the first to request a unique name and pay the required fee. That’s all there is to it.

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Internet Architecture and Governance

Even though no one owns the Internet as a whole, parts of it are owned and controlled by many different
private and public entities. Network channels in the United States are largely private while in other
foreign countries, for example China, the government owns the backbone. To ensure continuity and
connectivity throughout the world, various organizations have been established to help administer the
Internet:

 Internet Architecture Board: defines the overall structure of the Internet

 Internet Corporation for Assigned Names and Numbers (I CAAN): assigns IP addresses
 World Wide Web Consortium: sets standards for the web

Just remember, no one owns it. And, it’s not free.

Interactive Session: Organizations: Net Neutrality: The Battle Continues (see page 243 of the text)
introduces arguments for charging Internet users based on the amount of transmission capacity
they use. There are some very good points made for both proponents and opponents.

Not only is bandwidth saturation becoming a problem on Internet connections and other network
connections, but now the problem is spreading to mobile phone networks as evidenced by the article
below lamenting AT&T’s difficulties with its iPhone users.
AT&T wants its iPhone users to use less wireless data, and it may consider new pricing
models to curb users’ data usage as it tries to keep up with growing demand. At an
investor conference in New York on Wednesday, Ralph de la Vega, A T&T’s head of
wireless, said the wireless operator is considering incentives to get consumers to reduce
their data usage. De la Vega said 3 percent of smartphone users are consuming 40 percent
of the network capacity.
“We’re going to try to focus on making sure we give incentives to those small
percentages to either reduce or modify their usage so they don’t crowd out the other
customers in those same cell sites,” said de la Vega according to a transcript of the
conference. “And you’ll see us address that more in detail.”
He went on to say that most consumers aren’t aware which applications use a lot of
bandwidth and which do not. For example, email does not consume a lot of bandwidth,
whereas streaming video and audio do consume a great deal of bandwidth.
“What’s driving usage on the network and driving these high usage situations are things
like video, or audio that keeps playing around the clock,” he said, according to the
transcript provided by AT&T. “And so we’ve got to get to those customers and have
them recognize that they need to change their pattern, or there will be other things that
they are going to have to do to reduce their usage.”
AT&T has been struggling to keep up with demand for wireless-data usage on its
network. The iPhone, launched more than two years ago, has revolutionized mobile web
usage. The device, which was built more for accessing the Net than making calls, can
access more than 100,000 applications, many of which use the mobile Internet.
iPhone users on average consume five to seven times more data per month than average
wireless subscribers, according to analyst firm Sanford Bernstein. And all this usage is
clogging the network, causing many iPhone users, especially in large cities such as New
York and San Francisco, to experience dropped calls, slow 3G service, and issues

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 connecting to the network at all. (“A T&T considers incentives to curb heavy data usage,”
CNet News, Marguerite Reardon, Dec 9,2009)

The Future Internet: IPv6 and Internet2

As the Internet and other networks continue to proliferate, it’s becoming very difficult to work with the
limited number of IP addresses available in the old system. Therefore, new IP addressing schemas are
being developed along with an expanded Internet architecture. IPv6 is an initiative designed to increase
the available IP addresses to handle the burgeoning number of users on the Internet.

If experts’ predictions are correct about the increasing usage and reliance on the Internet, and there’s no
reason to believe they aren’t, we need to improve and change the current configuration to meet future
demand. The Internet2 project may help. The Next Generation Internet project has similar goals of
advancing the use of the Internet in ways that will enhance our lives. Here’s how the Internet2 website
(http://www.internet2.com) compares the two projects:

“Internet2 is a collaborative effort by more than 180 U.S. universities, working with
partners in industry and government, to develop advanced Internet technologies and
applications to support the research and education missions of higher education. Internet2
is a project of the University Corporation for Advanced Internet Development (U CAID).

The Next Generation Internet (N GI) initiative is a multi-agency federal research and
development program that is developing advanced networking technologies, developing
revolutionary applications that require advanced networking, and demonstrating these
capabilities on testbeds that are 100 to 1,000 times faster end-to-end than today’s
Internet.”

Don’t worry that personal users of the “old” Internet will be left behind. New technologies
developed for Internet2 and NGI will trickle down to the traditional Internet and make it easier
for everyone to use.

Internet Services and Communication Tools

With the recent introduction of new communication and information appliances, such as smart phones,
PDAs, cell phones, and mobile data networks, organizations have found it necessary to upgrade their
networks to incorporate these new technologies.

Internet Services

We keep complaining about information overload, yet we crave more. The Internet provides access to
data about any topic you can imagine through software-based services such as discussion groups,
newsgroups, chat functions, instant messaging, Telnet, and FTP (file transfer protocol). Keep in mind
that false information is as readily available as is true and correct information. Just be careful about the
source of information you access.

The most useful feature of email is the ability to attach files to a message and send them to colleagues
anywhere in the world. This feature alone makes it a valuable tool for telecommuters and for
collaborating with coworkers, wherever they may be. Unfortunately the effectiveness of email as a
viable communication tool is diminished by spam and junk mail. The sheer numbers of email message
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sent are overwhelming some corporate email servers. Some businesses are now encouraging “no email
Fridays.”

Companies are using chat and instant messaging as a viable alternative to email.

Use one of the search engines or directly access a popular portal page such as www.yahoo.com or
www.msn.com and you’ll probably see a link to instant messaging services. A OL’s instant messaging
technology is available to anyone, even those who don’t use A OL as their service provider. Most I M
services let you set up private chatrooms and will tell you when family, friends, or colleagues are online
so you can “talk” to them. Some cell phones also allow you to send and receive I M messages from
wherever you are.

Interactive Session: People: Monitoring Employees on Networks: Unethical or Good Business?

(see page 248 of the text) discusses both sides of a very sticky situation between employers and
employees. It points out the need for every company to have corporate policies regarding
employee use of email and the Internet.

Voice over IP

Internet telephony services like Skype.com have vastly improved over the last few years and are now
becoming a popular way for a growing number of people to communicate over the Internet. The VoIP
(Voice over Internet Protocol) technology threatens traditional telephone companies unless they adapt
their business model to include this technology. You make long distance telephone calls free (from P C
to PC) or for a reduced price (PC to regular telephone) using this technology.

Here are a couple excerpts from the website, V oIP-Info.org

“Internet and computer technology have already changed the way people live, work, and
communicate. VoIP (Voice over Internet Protocol) is one of the converged technologies
behind this communication revolution. An ever growing number of Internet connections
around the world allow VoIP which turns Internet infrastructure into a giant global
telephone network. VoIP works in conjunction with other technology such as 3G cellular
network and wireless (Wi-Fi) that eventually could create a huge global mobile phone
network.

It is good news for consumers who can make phone calls worldwide at a very low or no
cost and with great features that traditional telephone companies can't offer for free now.
Looking forward, we believe Internet Telephony innovations are far beyond what we can
imagine now. Let’s utilize those technology advances and enjoy the feature-rich, low
cost, and evolutionary communication tools.”
“VoIP on WiMax will make the latest 3G technologies obsolete before they are
completely installed. The reason is because 3G cell phone technology is capable of 2Mbs
while WiFi is at 11Mbs in bursts and WiMax will be even greater therefore 3G is not
needed as VoIP over WiMax is going to provide more data, faster speeds and greater
numbers of users.

WiFi and WiMax may actually solve the goals of conquering the digital divide. There
will be a small price for this disruptive technology. There will be small legal battles

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 fought such as this one over territory with government agencies and private sector. In the
WiFi Online Newsletter commenting on a Wall Street Journal Article, we saw Verizon
fighting with the City of Philadelphia over their city wide WiFi and if you think about it
they do potentially have quite a bit to lose don't they?” (http://www.einfoxp.com )

The important thing to remember with all this new technology is that nothing is standing still. The
telecommunications and computer industries are working at breakneck speed to improve technologies in
order to improve the networking experience not just for companies, but also for home users. By
combining all the divergent networks into converged networks, businesses are able to save money. More
importantly, they are able to offer more efficient use of all the new technology.

Unified Communications

You use email. Then you switch to the telephone. Then you move to electronic conferencing. On to
instant messaging. Each of these has a separate channel and separate platform. Don’t you wish you
could merge them all into one unified communication package and save yourself time, aggravation,
and headaches? Now you can thanks to a single universally accessible service that lets you switch back
and forth between all these methods of communicating with others.

Virtual Private Networks

Companies all over the world are building virtual private networks (V PN) to help reduce costs and
make it easier for customers, suppliers, and employees to communicate. And why not? The Internet
technology offers organizations a much cheaper alternative to the high cost of building and maintaining
their own technology or using other technologies that aren’t built on the open standards of the Internet.
VPNs also offer companies an extra layer of security protection through the tunneling process because
of the “wrapping” effect not offered with generic transmissions.

The Web

In 1989, a scientist named Tim Berners-Lee created a software program to help him keep track of his
personal information. He eventually offered the software to other users and called it the World Wide
Web. In 1991, commercial use of the Internet was permitted for the first time and that’s when its use
started to explode. In 1993, Netscape Communications Inc. was formed by Marc Andreeson and Jim
Clark to market a new software application for the web called a browser. This graphical user interface
allowed users to maneuver around websites using a point-and-click method instead of textual
commands.

The World Wide Web is a vast repository of data and information connected through hyperlinks. When
you think about the fact that it didn’t even exist 20 years ago, it’s amazing to realize how much it has
permeated everything we do in our personal and business lives.

Hypertext

We discussed protocols before: the rules by which data are transmitted over networks. The Hypertext
Transfer Protocol (http) is what allows the web to operate. When you see a Uniform Resource
Locator (URL) address on a website, it will generally start with http://www. Most software browser
programs now automatically insert that for you so you can simply enter the domain name of the web site

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you want to access – businessweek.com, for instance. A U RL that begins with https: indicates a site
using secure socket layers that offers more secure transmission protocols than the plain http.

Web Servers

All websites are stored on web servers scattered throughout the Internet. Rather than a small business
owning and maintaining their own web server computers, they can pay a web hosting service to
maintain the site. It’s often cheaper and easier and the small business doesn’t have to worry about
downtime, scalability issues, or security.

There is a difference between a website and a web page. A website has the short domain address, such
as www.pearson.com. It is the central repository for many, many individual web pages that are included
at the end of the address after the domain name and a slash. A web page is a single document stored
within the website and probably linked to other pages on the site. Generally the home page is the first
page you’ll see when you initially access a website. It’s usually identified through the file name
index.htm or default.html.

Searching for Information on the Web

Search engines and directories use various methods to help you find information on the web. You
shouldn’t restrict yourself to just one or two search engines, but should try many different ones. You
may be surprised at the different results you’ll get using the same keyword search.

Some search engines use special software programs to monitor the web for new or updated sites or
pages. When they reach a new site or page, they analyze the contents and determine the correct category
in which it will be listed. They then add it to their database so that it will appear on the search result list
when someone enters the appropriate subject. You can search for F TP sites, videos, blogs, newswires,
business news, stock quotes, and weather using these search engine capabilities. Figure 7.12 below
diagrams how the Google search engine operates behind the scenes.

Figure 7.12: How Google Works

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When you’re shopping for products in a brick-and-mortar store, how many times have you wondered if
the price on that new bicycle is the best you can get? With mobile search capability on your smartphone
or tablet, you can access other stores or dealers and determine on-the-spot if you’re getting the best deal.
Mobile search also comes in handy if you’re trying to find restaurants, hotels, or popular sightseeing
spots in an unfamiliar area.

"It’s fair to say people aren’t searching for different things on mobile, they’re just
searching at different times,” says Feng. With mobile, you can search for a restaurant, a
museum or a shop right then and there, so mobile search tends to pick up in the evenings
and on weekends, when consumers are on the go. Not surprisingly, desktop search is
higher during the day, when people are at work – aside from a mobile spike during
lunchtime.
While it may take a few years for mobile search volume to exceed P C search volume,
mobile is taking an increasingly large stake in search queries. On Mother’s Day, 33% of
searches for “flowers” were from mobile devices.
One shortcoming of mobile search, however, is that people’s thumbs aren’t very nimble –
search sites see 1.5x more typos in queries on smartphones than on P Cs. (“6 Hot Mobile
Search Trends From Google & Bing,” Mashable.com, Lauren Drell, July 12, 2011)

Let’s assume you want to find the specifications online of an Apple iPad so you can compare it to an
Amazon Kindle. You enter the search term ‘iPad specifications’ in Google’s search engine and voila,
you get a hundred suggested sites to purchase the product rather than the specifications themselves.
Google is working hard to fix that problem through its development of semantic search. Its goal is to
build a search engine that understands human thoughts and phrases rather just finding words in its
database. It’s also working hard to improve its search engine results to return videos and pictures that
may be relevant to your search.

Predictive search provides a way for you to further your quest for information. Google uses an
algorithm for each search phrase you enter and provides a list of suggested pieces of additional
information you may want.

Sometimes search engines can be too thorough or too mechanical in producing results for search
phrases. Social search uses results of your friends’ searches, their friends’ searches, and
recommendations from other people to produce results of a search query rather than using mathematical
algorithms. Chances are greater that you'll get more relevant site listings.

Visual Search and the Visual Web have developed from the millions of photos and videos people now
post to the web. Searching through all the photos, videos, and images has become more popular and
more important. Websites like Pinterest and Instagram use visual images rather than text so it’s
important to find a way to search through them.

Many search engine home pages such as MySimon.com have shopping bots available at a single click.
Other shopping bot sites, like www.pricingcentral.com, gather information from many sources and
combine it for ease in comparing prices and availability. Keep in mind that some of the prices available
through these kinds of sites may not be the absolute lowest you could find on your own. Some
companies pay a service fee to the shopping bot sites to have their products listed regardless of whether
they are the lowest price. Buyer, beware.

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Search result listings show you which websites contain information related to your search words or
phrases. The listings may also include sponsored links to sites related to your search request. Sponsored
links are part of a burgeoning business known as search engine marketing. It provides businesses a
new way to connect to potential customers through the special links at the top of the search result list or
a special box on the right side of the search result page. Each time a user clicks on a sponsored link, the
advertiser pays a fee to the search engine.

Because most people tend to stick to the first ten results of a search list, it’s important that Webmasters
and site owners do what they can to have their sites listed as close to the top of the list as possible.
Search engine optimization is the art and science of creating websites and pages so that happens. For
instance, if your website is devoted to selling African violets, you can include keywords in your home
page in such a way that your site will rank higher than others in search results. Another trick is to link
your site to similar sites devoted to the same subject – link your site to the African Violets Society of
America’s site.

Web 2.0

Making the web convenient, easy to use, and having it work for us, is the idea behind Web 2.0 services.

Let’s say you’re looking for a new home in a new city that you’re not familiar with. You’d like to see
information about local schools and perhaps crime statistics for your new neighborhood. You could
spend hours researching data and trying to figure out how all the information correlates. Or, you could
use a Web 2.0 service called a mashup and have the computer connect the dots for you.

You don’t have to search for information at all if you don’t want. Perhaps you’re an avid reader of blogs
about golf. Rather than checking the entire blogosphere everyday for new information, you register
your information needs with a RSS (Real Simple Syndication) service. When new information is
available, you’ll automatically receive a notification on your desktop similar to the newscast ticker tapes
you see on your television screen. What began as a convenient method of receiving blog updates, has
now spread across a variety of news, sports, and information services to provide a convenient method of
staying connected. Twitter.com produces microblogging posts that are limited to 140 characters.

Wikis are becoming a popular way to share information between employees, managers, suppliers,
partners, and even customers. For instance, your collaborative team is devising a new advertising
campaign. You have lots of input that previously was passed around the team via email. But that’s
unwieldy and doesn’t give any of your team members a convenient method of searching for information.
Who wants to sort through 83 emails looking for one piece of information?

Instead, your team could use a wiki to post ideas, information, or details of the latest version of your
campaign in one consolidated location. All your team members could post comments, edit comments
from others, and collectively store all the files associated with the project. Searching for a particular
piece of data is easy and fast. Wikis are much easier to use than more sophisticated knowledge
management systems and the software is much cheaper.

What started out as a way for teenagers and college students to connect to their friends online and share
photos and gossip, is now a multi-billion dollar social networking industry embraced by the likes of I B
M, Ford Motor Company, and Coca-Cola. They have gone far beyond simply staying in touch with a
few dozen—or few hundred—friends to an almost necessity in corporate life.

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Web 3.0 and the Future Web

The same individual who began the web, Tim Berners-Lee, is now involved in creating Web 3.0.
Basically, data and content on the web are currently stored in individual files that don’t easily connect
one to another. A Word file may be stored on a corporate database server while a spreadsheet file about
the same subject is stored on your laptop. What if all that data were automatically connected so when
you try to find all the information you need about your company’s latest marketing campaign, the
semantic web would do it for you?

"Some Internet experts believe the next generation of the Web—Web 3.0—will make
tasks like your search for movies and food faster and easier. Instead of multiple searches,
you might type a complex sentence or two in your Web 3.0 browser, and the web will do
the rest. In our example, you could type "I want to see a funny movie and then eat at a
good Mexican restaurant. What are my options?" The Web 3.0 browser will analyze your
response, search the Internet for all possible answers, and then organize the results for
you.

That's not all. Many of these experts believe that the Web 3.0 browser will act like a
personal assistant. As you search the web, the browser learns what you are interested in.
The more you use the web, the more your browser learns about you and the less specific
you'll need to be with your questions. Eventually you might be able to ask your browser
open questions like "Where should I go for lunch?" Your browser would consult its
records of what you like and dislike, take into account your current location, and then
suggest a list of restaurants." (Copied from http://computer.howstuffworks.com/web-
30.htm, Jonathan Strickland, Dec. 2011)

Businesses and organizations generate so much data with all the new technologies now available. They
want to put the data to good use to improve operations and profits. But it’s a lot of data – hence the
name ‘Big Data.’

Wireless sensor networks and other networks send their output over an “Internet of Things” for analysis.
Any object that generates data can be the focus of the Internet of Things.

Other trends pointing towards the future web include the App Internet, cloud computing and
software as a service, ubiquitous connectivity, and the transformation of the web into a seamless
and interoperable true web of networks.

Bottom Line: The Internet is a vast worldwide compilation of networked computers. I P addresses
and the Domain Name System help ensure transmissions are routed to the correct recipient.
Many applications such as email, F TP, newsgroups, instant messaging, and chatting are available.
The Internet2 and NGI projects will improve on the current Internet configurations and make it
easier and faster to exchange information and data. Companies wanting to gain a competitive
advantage need to incorporate Internet and web-based services into their business model. Web 3.0
and the Internet of Things point to the future of the web.

7-4 What are the principal technologies and standards for wireless
networking, communication, and Internet access?

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Much as we’ve seen a convergence in wired digital devices such as computers, televisions, and
telephones, we’re seeing a widespread convergence in wireless technology and the services it offers. If
content can be digitized, it can be transmitted over wireless networks. That includes voice, documents,
photographs, music, movies, television shows, you name it. Why should we wait to show pictures of our
vacation until we get home when we can instantly transmit them over the Internet via a photo-equipped
cell phone? Why can’t we take a thousand songs loaded on a wireless device with us wherever we go?

Wireless communications use a variety of gadgets such as paging systems, cell phones, and tablet
computers. One of the hottest communication appliances is the smart phone equipped with web
browser software. Some merchants are teaming with web portals to use global positioning systems to
pinpoint your location. Once the merchants know you’re in the local area, they offer you discounts on
meals, clothing, and movies if you respond within the hour. As you’re walking down the sidewalk, you
can use your smart phone to locate restaurants, check movie schedules, review sports scores, take and
send photographs, and use maps to find your way.

Cellular Systems

Interestingly enough, the United States is not among the most “wired wireless” countries in the world;
that honor goes to South Korea, Japan, and many European countries. Many developing nations are
bypassing traditional, old-fashioned communication infrastructures and going straight to wireless. It’s
easier and cheaper.

Unfortunately each world region has adopted different standards for wireless networks and very often
the standards don’t allow for cross transmissions. Two major standards used in the world are:

 Global System for Mobile Communication (G SM): bandwidth is based on time division multiple
access and is used in Europe, China, and Asia, and some regions of the United States.
 Code Division Multiple Access (C DMA): transmits over several radio frequencies and randomly
assigns users to a range of frequencies over time. It is used mostly in the United States.

Just as we’ve experienced generations of computers and computer languages, we allocate generational
labels to wireless phone systems. Basically, we are working with two generations of cell technology:

 3G networks: Appeared in the early 2000s and are based on packet-switch technology that
allows large amounts of data transmission. Supports voice, video, graphics, and wireless
broadband Internet access.
 4G networks: Just beginning to roll out in 2009 and 2010. Provides speeds between 1Mbps and
1Gbps with premium quality and high security.

Wireless Computer Networks and Internet Access

In order for wireless networks to work in tandem with each other, it is necessary to create standards such
as we have with Internet protocols and other network technologies.

Bluetooth

The Bluetooth wireless technology standard comes installed on some computers, which helps create
small personal area networks (PANs). It’s more appropriate to use Bluetooth technology in battery-

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powered devices that are within close proximity to each other. Bluetooth technology is mostly used to
connect keyboards, printers, computers, and handheld devices all within very close range.

"Bluetooth technology is a short-range communications technology that is simple,

secure, and everywhere. You can find it in billions of devices ranging from
mobile phones and computers to medical devices and home entertainment
products. It is intended to replace the cables connecting devices, while
maintaining high levels of security.

The key features of Bluetooth technology are robustness, low power, and low
cost. The Bluetooth Specification defines a uniform structure for a wide range of
devices to connect and communicate with each other.

When two Bluetooth enabled devices connect to each other, this is called pairing.
The structure and the global acceptance of Bluetooth technology means any
Bluetooth enabled device, almost everywhere in the world, can connect to other
Bluetooth enabled devices located in proximity to one another.

Connections between Bluetooth enabled electronic devices allow these devices to

communicate wirelessly through short-range, ad hoc networks known as piconets.
Piconets are established dynamically and automatically as Bluetooth enabled
devices enter and leave radio proximity meaning that you can easily connect
whenever and wherever it's convenient for you." (Copied from
www.bluetooth.com)

Even though the Bluetooth technology got off to a slow start in the early 2000s, it is now being used for
all kinds of applications, even automobiles. Vehicles are coming equipped with Bluetooth technology
and allow the use of hands-free cell phones, stereos, global positioning systems, and security devices.
Figure 7.13 demonstrates a typical Bluetooth network.

Figure 7.13 A Bluetooth Network (P AN)

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Wi-Fi and Wireless Internet Access

We mentioned earlier that today’s computing environment should be referred to as “wireless.” The
recent proliferation of wireless technology is technically known as the 802.11 networking standard. It’s
more commonly, and easily, called Wi-Fi for wireless fidelity. Wi-Fi can be installed on your existing
computers and connect them through a router hub via access points. If you have several computers at
home or in the office, a Wi-Fi network can help save money by negating the need for additional phone
lines for Internet access or to use a single peripheral device such as a printer among several different
computers. Each computer requires a wireless NIC (network interface card) containing a built-in radio
and antenna. These cards are relatively inexpensive and you can avoid duplicating more expensive
equipment by using a wireless network.

You can access Wi-Fi networks in public areas such as libraries, Internet cafes, hotels, and airports.
Access points to a wireless network are called hot spots and are proliferating in many public places.
You should be aware of the dangers in using these hot spots. They lack strong security measures typical
of wireless networks. You may experience interference problems as more users try to access the
network.

One of the biggest challenges facing the Wi-Fi industry is creating enough hotspots all around the
country to provide blanket coverage without interruption. Currently, there are still not enough
continuous connections and many times users are dropped without warning. It’s similar to the situation
cell phones users have experienced with dropped calls and service interruptions.

WiMax

Unfortunately there are still large regions of the United States that must continue to rely on old
telephone systems for Internet access. That prevents users from taking advantage of new high-speed
access and many of the feature-rich applications available on the Internet. And because of limitations in
frequency ranges associated with Wi-Fi, Bluetooth, and other technologies, many users are left out of
the Internet evolution. A new technology called WiMax is being developed to help fill the gaps all
across the country. WiMax increases the range of transmissions up to approximately 30 miles and
increases the transmission speeds significantly over that available on regular telephone lines and dial-up
modems.

RFID and Wireless Sensor Networks

Radio Frequency Identification (R FID) systems are an excellent example of how wireless technology
is totally remaking supply chain management systems. R FID tags are small microchips that contain
information about the product. This technology holds a distinct advantage over the old bar codes
because it doesn’t require line-of-sight readers. Instead, the tags transmit data via radio frequencies to
computing devices that track the product. The tags can be either active or passive. Let’s compare the
characteristics of each:

 Active RFID tags: battery powered; data can be rewritten; have a longer read range, shorter
operational life
 Passive RFID tags: no power source, smaller, lighter, and less expensive; unlimited operational
lifetime; shorter read range

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Figure 7.15 shows how the RFID technology works.

Figure 7.15: How RFID Works

RFID tags offer more inventory management control over products than the current bar code technology
for several reasons:

 More data can be written to R FID tags.

 More real-time data can be provided by R FID tags.
 RFID tags can trigger other processes within the computer system.
 RFID tags do not require line-of-sight readers.

Even though RFID tags are more expensive than bar-code technologies, costs are dropping as they
become more prevalent and the system switch-over is completed. For example, in 2001 a single R FID
tag cost approximately $2.00. An RFID tag in 2010 costs approximately 10 cents.

"In 2011, the cost of passive tags started at U S$0.05 each and special tags, meant
to be mounted on metal or withstand gamma sterilization, can go up to U S$5.
Active tags for tracking containers, medical assets, or monitoring environmental
conditions in data centers all start at U S$50 and can go up over US$100 each.
Battery Assisted Passive (BAP) tags are in the US$3–10 range and also have
sensor capability like temperature and humidity." (Copied from Wikipedia.com)

Near field communication (N FC) uses electromagnetic radio fields to enable two compatible devices
to exchange data when brought near each other. For instance, you have a web link on your phone that
your friend wants. You could email or text the link to her but with N FC, you simply place your phone
near hers and the link is exchanged. If you use the ApplePay app or GooglePay app, changes are you
have near field communication technology on your phone that allows you the convenience.

Wireless Sensor Networks

Businesses use wireless sensor networks (W SNs) to connect handheld devices with data storage
devices and allow workers to roam untethered through warehouses and office buildings. In the long-run,
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WSNs will be cheaper for businesses and homes since no structural changes will need to be made to the
building’s walls, ceilings, or floors. If you want to add equipment, you’ll simply add another node to the
network. You won’t have to cut holes, run wires, or alter the physical structure at all.

Bottom Line: Wireless technologies such as Bluetooth and Wi-Fi create small networks that
connect just about any kind of computing device. They are easier to configure and connect than
wired technologies and allow users more flexibility and access. Wireless access points, or hotspots,
are springing up in airports, hotels, coffee shops, and rest stops all across the country and world.
RFID technology is giving companies new opportunities and challenges for supply chain
management.

7-5 How will MIS help my career?

The chapter’s elements and information can help in securing a good job as an automotive digital advisor.
These types of jobs are becoming more popular as information technology becomes more important in
the workplace.

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