Network Topologies

1. NETWORK
TOPOLOGIES

2. Networks
A network is two or
more computers
connected together so
they can communicate
which each other.
There are 2
main types of
network…

3. Networks: LANs
LAN
stands
for:
LOCAL
AREA
NETWORK
LANs are networks
that are found where
computers within a
building need to
communicate.
They are Small and Local!

4. Networks: WANs
WAN
stands
for:
WIDE
AREA
NETWORK
WANs are networks
that are found where
computers in
different areas or
countries need to
communicate.
They are long range and not local!

5. Topology
The way devices on
the network are
physically connected
is known as Topology.
The physical layout or the
way in which network
connections are made is
called a Topology.

6. Network Topologies
There are six types of network topology :
• Bus Topology
• Star Topology
• Ring Topology
• Tree Topology
• Mesh Topology
• Hybrid Topology

7. Network Topologies
The Bus (or line) Network:
Computers are
connected like bus
stops on a main
road. None of
them is more
important than
any of the others.

8. Network Topologies
The Bus (Line) Network:
Advantages:
•It is cheap as it uses
the least amount of
cable.
•More computers can be
added without
disruption.
Disadvantages:
•With a lot of users, the
network will be slow as
data has to travel
through the same central
cable.
•Failure of the central
cable will stop the
network from working.

9. Network Topologies
The Star Network:
Computers are
connected like a
star to a central
computer such as
a mainframe.
This is also called
the “host”
computer.

10. Network Topologies
The Star Network:
Advantages:
•If a cable fails, it will
only affect one
workstation.
•More computers can be
added without
disruption.
Disadvantages:
•It is more expensive as
it uses the most cabling.
•Failure of the central
computer will stop the
network from working.

11. Network Topologies
The Ring
Network: Computers are
connected
together to form a
ring shape so that
none of them is
more important
than any of the
others.

12. Network Topologies
The Ring
Network:Advantages:
•They are cheap to
expand.
•The data flows around
the network in one
direction so it is fast.
•There is no reliance on
a central computer.
Disadvantages:
•If there are a lot of
users on the network, it
could slow down as all
the data is sent along a
single line.
•If one computer in the
ring stops working, the
whole network stops.

13. Network Topologies
The Tree Network:
Computers are
connected
together by the
network
combination of
star & bus
topologies.

14. Network Topologies
The Tree Network:
Advantages:
•Point-to-point wiring for
individual computer.
•Supported by several
hardware & software
vender's.
Disadvantages:
•Overall length of each
computer is limited by
the type of cabling used.
•If the central cable
breaks, the whole
network stops.
•More difficult to
configure.

15. Network Topologies
The Mesh
Network:
Each of the
network
Computers are
interconnected
with one another.

16. Network Topologies
The Mesh
Network:Advantages:
•Data can be transmitted
from different computer
simultaneously.
•This topology can
withstand high traffic.
•Even if one of the
computer fails there is
always an alternative
present.
Disadvantages:
•There are high chances
of redundancy in many
of the network
connection.
•Overall cost of this
network is too high.
•Set-up & maintenance
is very difficult.

17. Network Topologies
The Hybrid
Network: Computers are
connected
together by the
different
combination of the
topologies.
Ring
Mesh

18. Network Topologies
The Hybrid
Network:Advantages:
•It provides better result
by it.
•It can be designed in
many ways for various
purpose.
Disadvantages:
•It is costly.
•Difficult to identify the
problem if the entire
network shutdown.