4. Bus Topology
In the bus topology, the network nodes (computers,
printers, and other devices connected together to
share information) are connected to a common
backbone cable
6. •Data is sent to all computers on the trunk. Each computer
examines EVERY packet on the wire to determine who the
packet is for and accepts only messages addressed to them.
•good for a temporary, small (fewer than 10 people) network
•Performance degrades as more computers are added to the bus
• Bus is a passive topology .
7. Advantages of Bus Topology
Works well for small networks
Inexpensive to implement on a small scale
Requires less cable
Easy to add another workstation
8. Disadvantages of Bus Topology
Management costs often too high
Difficult to isolate a malfunctioning node or
cable segment and associated connectors
Possible for defective node to take down the
entire network
Subject to congestion from network traffic
9. Star Topology
The star topology is a network configured
with a central hub and individual cable
segments connected to the hub, resembling
the shape of a star.
A hub is a central device used in the star
topology that joins single cable segments or
individual LANs into one network.
11. Advantages of Star Topology
Easier to manage than a bus
Easier to locate node and cable problems
Easier to expand than a bus or ring,
especially for enterprise networking
Well suited for expansion into high-speed
networking
More equipment options
12. Disadvantages of Star Topology
Susceptible to a single point of failure
Requires more network cable at the start
than a bus
13. Ring Topology
A ring topology is a network in the
shape of a ring or circle, with nodes
connected around the ring.
15. Ring Topology (LAN)
Redundant ring to
avoid network failure
• Repeaters at each
component
• Unidirectional
transmission links
• Closed loop
• Typically used
in FDDI networks
16. Advantages of Ring TopologyAdvantages of Ring Topology
Easier to manage than a bus
Easier to locate node and cable
problems
Good over long distances
Handles high-volume traffic well
Very reliable
17. Disadvantages of Ring TopologyDisadvantages of Ring Topology
Requires more network cable and
equipment at the start than a bus
Not as many equipment options as for
a bus
Not as widely used as the bus topology
19. Mesh Environment
Every device interconnected
Most expensive
Most Fault tolerant
Cable fault tolerant
Device fault tolerant
The Internet is Mesh Topology