BUS NETWORK TOPOLOGY

BUS NETWORK TOPOLOGY:WHAT IS BUS NETWORK?

In Bus network topology ,devices share a common backbone cable to send and receive data.A co-axial cable is used to connect all devices.Bus Network Topology always uses daisy chain scheme to add more devices in a network. In this scheme one device is connected to another ,another to next.The First & last terminating point connect 50 ohm terminator resistor.

WHAT ARE THE BASIC STRUCTURE OF BUS NETWORK TOPOLOGY:

In Bus network topology,the main server is connected at one end of the backbone cable and the other device is connected different positions along the backbone cable known as Trunk.At both end of Bus Network Topology is connected to terminator which helps to terminated the unused data signal.It is very useful in destroying unsent data to from the cable if the destination is faulty.In this Bus Network Topology sends data to all the devices which is connected to the dedicated lines.For example, If PC-1 Sends data to PC-4 ,then the data which is sent from PC-1 is sent to all the PC which connected with the backbone cable or dedicated lines.When messages arrives at each device , it checks the destination address ,encoded in the message. If the address matches arrives the data.If the address is not matched ,the device ignore the data.Due to this a number of devices waiting to send data on the bus are more.This result is slowing down the performance of  a network.The basic structure of the bus network topology is shown :

In Bus Network Topology,the devices are not responsible for data transmission from one device to another .They can only listen to information sent on a network.If one device fails,it doen't affect the entire network.In an active topology,devices regenerate signals and take part in transfer of data: Hence, if one device falls then the  entire network is affected.
Every Device on a network shares a common cable.When two machines transmitted data at the same time the signals collide.Due to this,the information is destroyed.The process is called collision.Collision can affect the performance of the network.

ADVANTAGE AND DISADVANTAGE OF BUS NETWORK TOPOLOGY

Bus Network Topology, is also called as a liner bus.It is the simplest and common method of computer networking.However,Bus Network best with a limited number of devices.

Advantage of Bus Network Topology:

• Easy to connect the devices to linear Bus.
• Requires Less cable & cost efficient.
• Less Expensive than other topology .
• Work better for smaller network.

Disadvantage of Bus Network Topology:

• Entire network gets affected if there is a break in the main cable
• Terminators are required at both ends of the backbone cable.
• You face Difficulty to detect the faulty devices.
• Limited number of devices can be attached.
• Heavy  traffic and addition of devices degrades the performance.
• Expensive than single node topology.