The document discusses network topologies and is intended to teach students about different network structures. It defines network topology and describes three main types: bus, ring, and star. For each topology, it provides the definition, advantages, and disadvantages. The objectives are for students to explain and differentiate the three network topologies. It includes content sections defining the topologies and exercises for students to test their understanding.

1. INFORMATION AND COMMUNICATION TECHNOLOGY
(ICT) FOR YEAR NINE (JS 3) STUDENTS
REGAL COLLEGE, SAGAMU
TOPIC: Network Topologies

2. Main Menu
OBJECTIVE
CONTENT
EXERCISE
SUMMARY
EXIT

3. OBJECTIVE
At the end of this lesson, student should be able
to achieve all the three objective below:-
Explain meaning of network topology with
correctly.
At the end of this lesson, student should be able
to achieve all the three objective below:-
State three types of network topologies
correctly.
Differentiate correctly between the three types
of network topology.
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4. CONTENT
Definition of
Network Topology
Types of
Network Topology
Differentiation Between the
Types of Network Topology
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5. DEFINITION
What is a Topology ?
This refers to the structural
architecture or arrangement of
cables, computers and other
peripherals devices in network.
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6. TYPES OF NETWORK TOPOLOGY
Three commonly used network topologies
are:-
Bus network.
Ring network.
Star network.
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7. BUS TOPOLOGY
All computers and devices are
connected to central cable or bus.
It consists of a main run of cable
with a terminator at each end.
They are popular on LANs
because they are not expensive
and easy to install.
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8. BUS TOPOLOGY
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9. BUS TOPOLOGY
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10. RING TOPOLOGY
Cable forms closed ring or loop,
with all computers and devices
arranged along the ring.
Data travels from device to
device around entire ring, in
one direction.
Primarily is used for LANs,
but also is used in WANs.
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11. RING TOPOLOGY
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12. STAR TOPOLOGY
All devices connect to a
central device, called
Hub or switch.
All data transferred
from one computer to
another pass through the
Hub or switch.
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13. STAR TOPOLOGY
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14. STAR TOPOLOGY
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15. DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY
WHAT ARE THE DIFFERENCES
BETWEEN THE THREE OF
NETWORK TOPOLOGY?
SEARCH IN THE INTERNET
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16. DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY
BUS
ADVANTAGE DISADVANTAGE
1) Easy to connect computer or 1) Entire network shuts down if
peripheral to a linear bus. there is a break in the main
cable.
2) Requires less cable length 2) Terminators are required at
than a star topology. both ends of the backbone
cable.
3) Failure of one computer does 3) Difficult to identify the
not affect the rest of the problem if the entire network
network. shuts down.
4) Requires no hub or switch 4) It is increasingly becoming
outdated
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17. DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY
RING
ADVANTAGE DISADVANTAGE
1) Data is quickly transferred 1) Data packets must pass
without a ‘bottle neck’. through every computer
between the sender and
recipient therefore, this makes
it slower.
2) The transmission of data is 2) If there is a fault in the wiring
relatively simple as packets between two computers then the
travel in one direction only. whole network will fail.
3) It is possible to create very 3) It is difficult to troubleshoot
large networks using ring the ring.
topology.
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18. DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY
STAR
ADVANTAGE DISADVANTAGE
1) Easy to install and expand. 1) Requires more cable length
than a linear topology.
2) Security can be implemented 2) If the hub or concentrator
in the hub/switch. fails, nodes attached are
disabled.
3) Easy to detect faults and to 3) More expensive than linear
remove parts. bus topologies because of the
cost of the concentrators.
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19. EXERCISE
1) Which of the following statements describes
network topology correctly ?
A. Devices attached or detached at any
point on the network.
B. The failure of device on the network.
C. The structural architecture or arrangement
of cables, computers and other peripherals
devices in network.
D. All of the above.
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20. EXERCISE
2) On a __________, all of the computers and
devices (nodes) on the network are
connected to a central device.
A. Bus network.
B. Ring network.
C. Star network.
D. All of above.
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21. EXERCISE
3) On a star network, the central
device that provides a common connection
point for computers and devices on the
network is called the __________.
A. Hub/Switch.
B. Personal computer.
C. Printer.
D. File server.
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22. EXERCISE
4) On a bus network, such as that illustrated in the
accompanying figure, if one node fails ________.
A. Only that node is affected.
B. Only the nodes before that node are affected.
C. Only the nodes after that node are affected.
D. All the nodes are affected.
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23. EXERCISE
The transmission of data is relatively simple
as packets travel in one direction only.
5) The statement above correctly
refers to the ______.
A. Bus network.
B. Ring network.
C. Star network.
D. All of the above.
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24. EXERCISE
6) All the statements are true about ring
topology except _____________
A. Data is quickly transferred without a
‘bottle neck’.
B. The transmission of data is relatively simple as
packets travel in one direction only.
C. If any of the nodes fail then the ring is broken
and data cannot be transmitted successfully.
D. Security can be implemented in the hub/switch.
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25. EXERCISE
7) Which of the following statements is true
about star topology?
A. Difficult to identify the problem if the entire
network shuts down.
B. Terminators are required at both ends of the
backbone cable.
C. The transmission of data is relatively simple
as packets travel in one direction only.
D. Easy to detect faults and to remove parts.
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26. ANSWER
QUESTION 1
QUESTION 2
QUESTION 3
QUESTION 4
QUESTION 5
QUESTION 6
QUESTION 7
YOU ANSWER IS WRONG,
TRY AGAIN !!!
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27. ANSWER
QUESTION 1
QUESTION 2
QUESTION 3
QUESTION 4
QUESTION 5 YOUR ANSWER
IS CORRECT !!!
QUESTION 6
QUESTION 7
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28. SUMMARY
BUS TOPOLOGY
DEFINITION ADVANTAGE DISADVANTAGE
•All computers •Easy to connect a •Entire network shuts
and devices computer or down if
connected to peripheral to a linear there is a break in the
central cable bus. main cable.
•Requires less cable •Terminators are
length than required at both
a star topology. ends of the backbone
cable.
•Difficult to identify
the problem
if the entire network
shuts down.
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29. SUMMARY
RING TOPOLOGY
DEFINITION ADVANTAGE DISADVANTAGE
•Cable forms •Data is quickly •Data packets must pass
closed ring or transferred without a through every computer
loop, with all ‘bottle neck’. between the sender and
computers and recipient therefore, this
devices arranged •The transmission of
data is relatively makes it slower.
along ring.
simple as packets
•If any of the nodes fail
travel in one direction
then the ring is broken
only.
and data cannot be
transmitted successfully.
•It is difficult to
troubleshoot
the ring.
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30. SUMMARY
STAR TOPOLOGY
DEFINITION ADVANTAGE DISADVANTAGE
•Requires more cable
•All devices •Easy to install and length
connect to a wire. than a linear topology.
central device,
called hub. •Security can be If the hub or
implemented concentrator fails,
in the hub/switch. nodes attached are
disabled.
•Easy to detect faults
and to More expensive than
remove parts linear bus topologies
because of the cost of
the concentrators.
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31. ARE YOU SURE TO EXIT ?
YES NO

32. INFORMATION AND
COMMUNICATION
TECHNOLOGY (ICT) FOR YEAR
NINE (JS 3) STUDENTS
REGAL COLLEGE, SAGAMU