A Seminar On

Networks and Networking

Presented By,
ADABAJI FRIDAY

OAK BUSINESS SCHOOL

CONTENTS
 Introduction

 Meaning and Definition

 Need of Networking
 Types of Network

 Application of Networks

 Conclusion
INTRODUCTION
⚫A computer network or simply a
network is a collection of computers
and other hardware components
interconnected by communication
channels that allow sharing of
resources and information.
⚫ Computer network and technologies
that make communication between
networked computers possible
continue to drive computer hardware,
software and peripheral industries.
Cont…

⚫ The scope of communication has

been increasing significantly in the
knowledge era.
⚫ The expansion of related industries is
mirrored by growth in the numbers
and types of people using networks,
from the researcher to the home user.
Meaning and Definition
⚫A Network can be defined as a group of
computers and other devices connected
in some ways so as to be able to
exchange the data.
⚫ “A combination of computer hardware,
cabling, network devices, and computer
software used together to allow
computers to communicate with each
other”.
⚫ The computers on a network may be
linked through cables, telephone lines,
radio waves, satellites or infrared rays
Need of Networking
⚫ File sharing: Networking of computers
helps the network users to share data
files.
⚫ Hardware sharing: Users can share
devices such as printers, scanners, CD-
ROM drives, hard drives, etc. Without
computer networks, device sharing is not
possible.
⚫ Application sharing: Applications can be
shared over the network, and this allows
implementing client/server applications.
Types of Networks
◦ Personal Area Network(PAN)
◦ Storage Area Network (SAN)
◦ System Area Network (SAN)
◦ Local Area Network (LAN)
◦ Metropolitan Area Network (MAN)
◦ Wide area Network (WAN)
◦ Wi-Fi Wireless Connection
Personal Area Network (PAN)
⚫A PAN is a network that is used for
communicating among computers and
computer devices (including telephones)
in close proximity of around a few meters
within a room.
⚫ It can be used for communicating
between the devices themselves, or for
connecting to a larger network such as
the Internet.
⚫ A personal Area network can be wired or
Wireless.
Cont…

⚫ PAN is a computer network used for

communication among computer
devices, including telephones and
digital assistants in proximity to an
Individual’s body.
⚫ Ex: Send Documents to the printer in
the office upstairs.
Storage Area Network (SAN)

⚫ A Storage Area Network connects

multiple servers and storage devices on
a single network.
⚫ A storage area network is any high
performance network whose primary
purpose is to enable storage devices to
communicate with computer systems
and with each other.
⚫ Many organizations operate perfectly
viable SANs that carry occasional
administrative and other application
traffic.
Cont…

Uses of SAN Network

 Better disk utilization
 Better availability of applications
 A good solution for multiple
applications
 To make the better usage of serves
 A better recovery for a single
application
System Area Network
⚫ It Connects high performance computer
with high speed connections on a Cluster
Configuration.
⚫ It is also known as Cluster Area Network
⚫ Provides a reliable, connection-oriented
transfer between two endpoints.
⚫ provide very high-speed, low latency
access to information that is stored in
single or multiple databases.
Local Area Network (LAN)
⚫A LAN is a network that is used for
communicating among computer
devices, usually within an office,
building or home.
⚫ LAN enables the sharing of resources
such as files or hardware devices that
may be needed by multiple users.
⚫ It is limited in size, typically spanning a
few hundred meters, and no more
than a mile.
Cont…
Advantages of LAN
⚫ Speed
⚫ Cost
⚫ Security
⚫ Email
⚫ Resource Sharing
Disadvantages of LAN
⚫ Expensive to install
⚫ Requires administrative install
⚫ File server may file
⚫ Cables may break
Metropolitan Network (MAN)

⚫A MAN is a large computer network

that usually spans a city or a large
campus.
⚫ A MAN is optimized for a larger
geographical area than a LAN,
ranging from several blocks of
buildings to entire cities.
⚫ A MAN might be owned and operated
by a single organization, but it usually
will be used by many individuals and
organizations.
Wide Area Network

● Multiple LAN’s are connected together

using devices such as bridges, routers
or gateways which enable them to
share the data.
● The world’s most popular WAN is the
internet.
Wireless Technology
● Wireless technology has helped to
simplify networking by enabling
multiple computer users to
simultaneously share resources in a
home or business without additional or
Intrusive wiring.
● These resources might include a
broadband Internet connection,
network printers, data files, and even
streaming audio and video.
Advantages of Wi-Fi
Advantages of WIFI
● Convenience: The wireless nature of such
networks allows users to access network
resources from nearly any convenient
location within their primary networking
environment.
● Mobility: With the emergence of public
wireless networks, users can access the
internet even outside their normal work
environment.
● Productivity: Users connected to a wireless
network can maintain a nearly constant
affiliation with their desired network as they
move from place to place.
Conclusion
● The best known computer network is
the internet. Computer network
support applications such asaccess to
the world wide web, shared use of
application and storage servers,
printers, and fax machines, use of
email and instant messaging
applications and so on…