The document discusses different network topologies including bus, ring, star, hierarchical/tree, and mesh. It defines topology as the layout and organization of connected devices in a network and how information is exchanged. It provides details on each topology type, describing their structure and characteristics, and listing their advantages and disadvantages.

1. NETWORK tOPOLOGY
Presentation
Peoples University of Medical & Health Sciences for Womens
Nawabshah SBA
Assigned By: Sir Shuhaib Uddin Memon
Presented by: Hizba Batool

2. Contents
 Topology Introduction
 Types of Topology
 Bus Topology & Others
 Advantages & Disadvantages
 Conclusion

3. Topology
 Topology is the form or
character of a network.
 It also refers to the layout
of connected devices.
 This layout also
determines the means in
which the information is
exchanged within a
network.
 The organization of a
network including its nodes
i.e sender & receiver &
connecting lines.
 The way in which
computers or other devices
are connected in a network
is called Network Topology.

4. Topology
P
L

6. Types of Network Topology

7. Topology
 The topology in which
all computers and
devices (nodes) are
connected to a single
cable so that all nodes
receive the same
message at the same
time.
 It is also called bus
network
 All computers connect
with one single wire
called back bone.

8. Bus Topology
In this topology all the
clients, servers &
resources are connected
to one medium (the bus).
When a node communicates,
the data is transmitted down
the bus which all devices
receive, but only the intended
recipient accepts and
processes the message.

10. Bus Topology
Advantages
•Works well for small
networks.
•Easy to add/ remove more
devices.
•If one node fails other
nodes are not affected.
•Its cost is minimum.
•Cable required is less as
compared to other
Disadvantages
•Entire network will disturb if
cable break.
•Adding/removing devices will
disturb/disable network.
•Heavy traffic can slow down
the network.
•Difficult to solve the problem.

11. Ring Topology
A ring network is a one
where all workstations &
other devices are
connected in a continuous
loop.
It is a bus topology in a
closed loop i.e data travels
in one direction only.
It consists of P2P links &
each node on the ring acts
a repeater. It receives a
transmission from the
previous node and
amplifies it before passing
it on.

13. Ring Topology
• Connected with single wire
in loop shape (no start no
end).
• Flow in one direction.
• Local area network.
• Use repeater to fast
transferring data flow or
signals.
• Data collision does not
occur.
• Difficult to isolate
problems.
• Changes in the network
configuration will disrupt
user operation.
• Breakdown of a computer
will affect the rest of the
user in the network.
Advantages
Disadvantages

14. Star Topology
In star topology each
device has its own
cable.
Through this cable
device is connected to
a common hub or
connecter.
Works with signals
catch through server.
This topology is
mostly used for
ethernet topologies.

16. Star Topology

17. ExtendedStarTopology

18. HierarchicalTopology
 It is also known as
Tree topology.
 It allows expansion of
an existing network
i.e it is used in wide
area network.
 It is much like a star
topology except that it
does’nt use a central
node.
 It is idyllic for group
workstations.

19. Hierarchical/TreeTopology
Advantages Disadvantages
Extension of bus and star topology. Heavily cabled.
Expansion of nodes is possible and easy. Costly.
Easily managed and maintained. Central hub fails, networks fails.
Error correction is easily done If more nodes are added maintenance is
difficult.

20. Mesh Topology
• A network setup
where each
computer and
network device is
interconnected
with one another.
• Allowing for most
transmissions to
be distributed,
even if one of the
connections go
down.
• It is a topology
commonly used
for wireless
networks.
• It has high fault
tolerance due to
multiple links.

22. Mesh Topology
In a partially connected
mesh topology, at least
two of the computers in
the network have
connections to multiple
other computers in that
network.
It is an inexpensive
way to implement
redundancy in a
network.
Partial Mesh
Topology In a full mesh topology,
every computer in the
network has a
connection to each of
the other computers in
that network.
The number of
connections in this
network can be
calculated using the
following formula (n is
the number of
computers in the
network): n(n-1)/2
Full Mesh
Topology

23. Mesh Topology• Can handle high amounts of traffic, b/c
multiple devices can transmit data
simultaneously.
• Adding additional devices does not
disrupt data transmission between other
devices.
• A failure of one device does not cause a
break in the network or transmission of
data.
• High cost wire.
• Installation & configuration is
difficult.
Advantage
s
Disadvantage
s