Department of Education
NATIONAL CAPITAL REGION
Self-Learning Module
for Senior High School
Learners
TECHNICAL-VOCATIONAL-LIVELIHOOD
COMPUTER SYSTEM SERVICING (CSS) NC II
LEARNING COMPETENCY:
1. Check network connectivity of each terminal in accordance with network design
2. Diagnose and repair any problem or fault in the network system in line with
standard operating procedures
3. Configure Network Interface Card (NIC) in accordance with the network design
4. Carry out communication check between terminals in accordance with operating
systems network configuration guides
5. Respond to unplanned events or conditions in accordance with established
procedures
TLE_IACSS9-12SUCN-Ia-e-34
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HOW TO USE THIS MODULE
Before you start answering the module, you are requested to set aside
other tasks that will disturb you while enjoying the lessons. Read the simple
instructions below to successfully enjoy the objectives of this kit. Have fun!
Follow carefully all the contents and instructions indicated in every
page of this module.
Write on your notebook or any writing pad the concepts about the
lessons. Writing enhances learning, which is important to develop and
keep in mind.
Perform all the provided activities in the module.
Let your facilitator/guardian assess your answers.
Analyze conceptually the posttest and apply what you have learned.
Enjoy studying!
SET - UP COMPUTER NETWORKS
Expectations
At the end of the module, you should be able to
1. Identify errors in network places.
2. Understand the functions of Dynamic IP Address.
3. Appreciate the importance of identifying and understanding the components of network
places and dynamic IP address.
Pre-Test
Multiple Choice: DIRECTIONS: Read each item carefully. Encircle the letter of the correct
answer.
1. What command is used to find out the IP address of a certain network in connected computer?
A. ping B. ipconfig C. dxdiag D. msconfig
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2. The parts of the replies that say things like time=105ms show you how long it took from the
time the client machine sent out the ping message until a reply came back.
A. round-trip response time C .hop count
B. decoding network address D. time to live
3. It indicates the network portion of an IP address.
A. subnet mask B. DNS C. IPV4 D. ipconfig
4. It is used to help your computer to find web pages and other addresses on the internet.
A. DHCP B. Internet Service Protocol C. IPV4 D. IPV6
5. A number used to identify a device on a network.
A. ping B. ipconfig C. dxdiag D. IP address
6. Each individual part of a data in a computer that represents 1 or 0.
A. bit B. byte C. kilobyte D. megabyte
7. An IP address assigned to each computer to avoid problems in figuring out the IP address of
each devices.
A. dynamic B. intranet C. internetwork D. static
8. Automatically assign IP addresses and greatly simplify the addressing process.
A. dynamic B. intranet C. internetwork D. static
9. A class A octet which indicates that the first octet of the IP address is the network portion
A. 255.255.255.0 B. 255.255.0.0 C. 255.0.0.0 D. 255.0.255.0
10. A domain name server (DNS) resolves machine names to numeric addresses.
A. round-trip response time C .hop count
B. decoding network address D. time to live
Looking Back
You have already learned in your computer class the wide variety of networking
cables. You need to know what type of cable to be used on the job requirements.
Exercise 1: Directions: Complete the pin number designation for T-568B (Straight-through) and
T-568A (Cross-over) cables. Write your answer in a sheet of paper.
T-568B T-568A
Pin Color Pair No. Pin Color Pair No.
1 white/orange 1 white/green
2 orange 2 green
3 white/green 3 white/orange
4 blue 4 blue
5white/blue 5 white/blue
6 green 6 orange
7 white/brown 7 white/brown
8 brown 8 brown
Brief Introduction
A protocol is a set of rules. A letter sent through the postal system also uses
protocols. Part of the protocol specifies where on the envelope the delivery address needs to be
written. If the delivery address is written in the wrong place, the letter cannot be delivered. Internet
protocol works similarly. They are set of rules governing communication within and between
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computers on a network. Protocol specifications define the format of the messages to be
exchanged.
Five Classes of IP Address
IP Classes Purpose
Class A Used for large networks, implemented by large companies and
some countries
Class B Used for medium-sized networks, implemented by universities
Class C Used for small networks, implemented by ISP’s for customer
subscription
Class D Used for special use of multicasting
Class E Used for experimental testing
Subnet Mask
The subnet mask indicates the network portion of an IP Address. Like the IP address, the subnet
mask is dotted-decimal number.
▪ 255.0.0.0 – Class A, which indicates that the first octet of the IP address is the network
portion
Class A Network Host
Octet 1 2 3 4
▪ 255.255.0.0 – Class B, which indicates that the first two octets of the IP address are the
network portion.
Class B Network Host
Octet 1 2 3 4
▪ 255.255.255.0 – Class C, which indicates that the first three octets of the IP address are
the network portion.
Class C Network Host
Octet 1 2 3 4
Class D addresses are used for multicast groups. There is no need to allocate octet or bits to
separate network and host addresses.
Class E addresses are reserved for research use only.
Ipconfig – is a command used to find out the IP address of a certain network you are connected
to.
How to use the ipconfig command?
1. Click on Start Button, then type cmd (command
prompt) on the search box.
2. A black screen will appear as shown in the figure
below.
FIG. 1 Command Prompt Window
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3. Type ipconfig and press enter. The figure below
shows the IP configuration window using the
ipconfig command. The information from this
window will be useful because it shows the IP
address, subnet mask and default gateway of a
network you are connected to.
Fig. 2 Configuration in CMD Window
Static IP Address
This is to avoid problems when you do
troubleshooting which requires figuring out the IP
address of each of them. It is also a means to prevent
address conflicts between the devices
.
▪ Open the Control Panel’s Network Connections
icon.
▪ Open the icon representing your computer’s
network connection.
▪ Click the Properties button in the Status dialog
box. Fig. 3 Wireless Network
▪ From the list of items, choose Internet Protocol Connections Properties Dialog
(TCP/IP). Box
▪ Click the Properties button. The Internet Protocol
(TCP/IP) Properties dialog box appears.
Fig. 4 TCP/IPV4
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▪ Type the IP address for your computer. Enter
the appropriate IP Address in the IP address
section. Type a subnet mask. The value used
on a local network is commonly 255.255.255.0,
but it can be different, such as
255.255.255.127. Type the default gateway
address. The default gateway is the router, so
type the router’s address. Figure 54 shows an
example of assigning an IP Address, Subnet
Mask, and default gateway.
Fig. 5 Assigning IP Address
▪ Type the address for the preferred DNS server. The address should be obtained from your
Internet Service Protocol. It is used to help your computer find web pages and other addresses
on the internet.
▪ Type the address for the alternate DNS server.
▪ The alternate Domain Name System (DNS) server’s IP address is something that your ISP
provides.
▪ Click OK to confirm the settings.
▪ Close all other open dialog boxes and windows
Dynamic IP Address
If more than a few computers comprise the LAN, manually configuring IP addresses for every
host on the network can be time-consuming and prone to errors. In this case, using a Dynamic
Host Configuration Protocol (DHCP) server would automatically assign IP addresses and greatly
simplify the addressing process.
Fig. 6 Assigning Dynamic IP Address
These are the IP address information that a DHCP server can assign to hosts:
→ IP address
→ Subnet mask
→ Default gateway
→ Optional values, such as a Domain Name System (DNS) server Address
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Ping
The ping is a Command Prompt command used to test the ability of the source computer to
reach a specified destination computer. The ping command is usually used as a simple way to
verify that a computer can communicate over the
network with another computer or network device.
▪ Click on Start Button, then type cmd
(command prompt) on the search box.
▪ A black screen will appear as shown in the
figure below.
▪ Type ping followed by the IP address you
desire to verify. The figure below shows the
screen of the ping command and its output.
Fig. 7 Step 3
This output shows several things:
Decoding names to network addresses — a
domain name server (DNS) resolves machine names
to numeric addresses.
Round-trip response time — The parts of the
replies that say things like time=105ms show you
how long it took from the time the client machine sent
out the ping message until a reply came back (1 ms
is 1 millisecond or one-thousandth of a second).
Routing hop count — the part of the replies that
says TTL=50 tells you about the route the
message took from one point to another. Fig. 8 Pinging
.
Peer-to-Peer Network
In a peer-to-peer network, devices are connected directly to each other without any additional
networking devices between them. In this type of network, each device has equivalent
capabilities and responsibilities. Individual users are responsible for their resources and can
decide which data and devices to share. Because of that, the network has no central point of
control or administration.
Setting up a Peer-to-Peer network in
Windows 7
If you are going to work with Windows 7
operating system, the following procedures are
used to set up a peer-to-peer network:
1. On Desktop Select My Computer
Right Click Select properties.
Fig. 9 Step 1
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2. Select Change Setting (administrative
permission will be required in this procedure).
Fig. 10 Step 2
3. Click or select Change.
Fig.11 Step 3
4. Change computer name and workgroup
name. Then, click OK.
Fig. 12 Step 4
5. Save the change (A Reboot will be required).
Fig. 13 Step 5
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6. After Reboot Right Click on My Network Place
Properties.
Fig. 14 Step 6
7. Turn on Network discovery, File sharing, Printer
Sharing
Fig. 15 Step 7
8. Click on Manage network connections.
Fig. 16 Step 8
9. Select Local Area Connection Properties
Fig. 17 Step 9
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10. Select Internet Protocol version 4 (TCP/IPv4)
properties.
Fig. 18 Step 10
11. Now enter the assigned IP address and then
click OK.
Fig. 19 Step 11
12. Now open My network place Click to change
then Select Turn on network discovery and file
sharing.
Fig. 20 Step 12
13. If you could see all computers in My Network
place, you have successfully configured a workgroup .
Fig. 21 Step 13
Client-Server Network
In a client/server network, the server provides the requested information or service to
the client. Servers on a client/server network commonly perform some of the processing work for
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client machines, such as sorting through a database before delivering only the records requested
by the client.
Fig. 22 Client/Server Network
Activity
Activity 1: “IP Addressing”
Directions: In this worksheet, given the several IP addresses with their appropriate subnet
masks, write which IP Address Class is appropriate in the IP Address Class column in the chart.
An example has been provided for you.
IP Address Subnet Mask IP Address Class
A. 10.10.10.10 255.0.0.0
B. 192.168.1.1 255.255.255.0
C. 172.168.1.1 255.255.0.0
D. 224.230.1.1 255.255.255.255
E. 247.250.1.1 255.255.255.255.
Discuss the IP Address class you select.
A. ____________________________________________________________________________
B. ____________________________________________________________________________
C. ____________________________________________________________________________
D. ____________________________________________________________________________
E. ____________________________________________________________________________
Remember
KEY TERMINOLOGIES
Ipconfig – is a command used to find out the IP address of a certain network you are connected
to.
Ping - is a Command Prompt command used to test the ability of the source computer to reach
a specified destination computer.
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Dynamic Host Configuration Protocol (DHCP) - automatically assign IP addresses and greatly
simplify the addressing process
Static IP Address - is also a means to prevent address conflicts between the devices.
Subnet mask - indicates the network portion of an IP Address
Checking Your Understanding
“GETTING TO KNOW”. Answer the given questions below.
1. What are the procedures involved in calculating IP Address?
____________________________________________________________________________
____________________________________________________________________________
2. List down different IP Classes?
____________________________________________________________________________
____________________________________________________________________________
3. What are the distinguished communication protocols?
____________________________________________________________________________
____________________________________________________________________________
4. What are necessary procedures in calculating subnet masks?
____________________________________________________________________________
____________________________________________________________________________
5. Show an example calculation of binary digits used in IP addressing?
____________________________________________________________________________
____________________________________________________________________________
Post-Test
1. It is used to help your computer to find web pages and other addresses on the internet.
A. DHCP B. Internet Service Protocol C. IPV4 D. IPV6
2. A number used to identify a device on a network.
A. ping B. ipconfig C. dxdiag D. IP address
3. Each individual part of a data in a computer that represents 1 or 0.
A. bit B. byte C. kilobyte D. megabyte
4. Automatically assign IP addresses and greatly simplify the addressing process.
A. dynamic B. intranet C. internetwork D. static
5. A class A octet which indicates that the first octet of the IP address is the network portion
A. 255.255.255.0 B. 255.255.0.0 C. 255.0.0.0 D. 255.0.255.0
6. A domain name server (DNS) resolves machine names to numeric addresses.
A. round-trip response time C. hop count
B. decoding network address D. time to live
7. What command is used to find out the IP address of a certain network in connected computer?
A. ping B. ipconfig C. dxdiag D. msconfig
8. The parts of the replies that say things like time=105ms show you how long it took from the
time the client machine sent out the ping message until a reply came back.
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A. round-trip response time C. hop count
B. decoding network address D. time to live
9. It indicates the network portion of an IP address.
A. subnet mask B. DNS C. IPV4 D. ipconfig
10. An IP address assigned to each computer to avoid problems in figuring out the IP address of
each devices.
A. dynamic B. intranet C. internetwork D. static
References
*Garcia & Bermudo. CCMTC-CHS Computer Hardware Servicing NCII-Reading Materials-
*Learner’s Material-Computer Hardware Servicing-Grade 10-First Edition, 2014
*www.cgpbooks.co.uk
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Answer Key
Pretest
1. B
2. A
3. A
4. B
5. D
6. A
7. D
8. A
9. C
10. B
Posttest
1. B
2. D
3. a
4. a
5. c
6. B
7. B
8. A
9. A
10. D
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