The document discusses different types of computer network topologies. It defines network topology as the physical configuration of cables, computers, and other devices on a network. The key network topologies covered are bus, ring, star, and mesh. Advantages and disadvantages of each topology are summarized.

1. Basic Concepts of Computer
Networks and Communications
Network Topology
Presented by-
Company
Hassan Jan
Habib
 LOGO BS (1st Semester)

2. Presentation Contents
 Definition of Computer Networks
 Different Network Methods
 LAN
 Network Topologies
 Summary

3. Computer Networks
Definition:
 Computer networking is the engineering decipline
concerned with the communication between computer
systems or devices.
 A computer network is any set of computers or devices
connected to each other with the ability to exchange
data.

4. Different Network Methods
Different Network Methods are:
 Local area network (LAN),
 Metropolitan area network (MAN)
 Wide area network (WAN)
 Wireless LANs and WANs

5. Local Area Network (LAN)
Local Area Network(LAN),
 which is usually a small network
constrained to a small geographic area.
An example of a LAN would be a
computer network within a building.

6. DEFINITION
What is a Topology ?
The physical topology of a network
refers to the configuration of cables,
computers and other peripherals.

7. TYPES OF NETWORK TOPOLOGY
Three commonly used network topologies
are:-
Bus Topology
Ring Topology
Star Topology

8. BUS TOPOLOGY
All computers and devices
connected to central cable or bus.
Consists of a main run of cable
with a terminator at each end.
Popular on LANs because they
are inexpensive and easy to
install.

9. BUS TOPOLOGY

10. RING TOPOLOGY
Cable forms closed ring or loop,
with all computers and devices
arranged along ring.
Data travels from device to
device around entire ring, in
one direction.
Primarily is used for LANs,
but also is used in WANs.

11. RING TOPOLOGY

12. STAR TOPOLOGY
All devices connect to a
central device, called
hub.
All data transferred
from one computer to
another passes through
hub.

13. STAR TOPOLOGY

14. STAR TOPOLOGY

15. MESH TOPOLOGY
 In the mesh topology each computer are connected with each other by
separate cable. Create point to point connection to every device on network.
If one cable fail data always has alternative path to get to its destination.
 On a large scale, you can connect multiple LANs using mesh topology with
leased line.
 This type topology generally use in military area.

16. DIFFERENTIATION BETWEEN THE THREE
TYPES OF NETWORK TOPOLOGY
WHAT ARE THE ADVANTAGES AND
DISADVANTAGES OF THE THREE
OF NETWORK TOPOLOGY?

17. 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.

18. SUMMARY
RING TOPOLOGY
ADVANTAGE DISADVANTAGE
DEFINITION
•Data is quickly
•Cable forms •Data packets must pass
transferred without a
closed ring or through every computer
‘bottle neck’.
loop, with all between the sender and
computers and •The transmission of
recipient therefore, this
devices arranged data is relatively
makes it slower.
along ring. simple as packets
travel in one direction •If any of the nodes fail
only. then the ring is broken
and data cannot be
transmitted successfully.
•It is difficult to
troubleshoot
the ring.

19. 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, •Security can be If the hub or
called hub. implemented concentrator fails,
in the hub/switch. nodes attached are
•Easy to detect faults disabled.
and to More expensive than
remove parts linear bus topologies
because of the cost of
the concentrators.

20. SUMMARY
MESH TOPOLOGY
DEFINITION ADVANTAGE DISADVANTAGE
Require more cable
•In the mesh •1.Provide redundant then other topology .
topology each path between device..
computer are
1.Provide redundant path between device.
connected with The network can be Complicated
each other by expanded without implementations.
separate cable.. disruption to current
user..