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Network Topologies

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Network Topologies

“ The way in which the connections are made among all the computers is called the topology of the network

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Types of Network Topology

Three (3) basic types of network topology: Bus topology. Star topology. Ring topology.

Bus Network

Star Network

Ring Network

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Types of Network Topology

Bus Topology.A bus network consists of a single central cable (backbone), to which all computers and other devices connect (nodes).

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Bus Network Topology

Working of Bus Network Topology:

T-Connector

Terminator

Backbone

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Bus Network Topology

Advantages of Bus Network:

i. Bus networks are inexpensive.

ii. Easy to use

iii. Failure of one device usually does not affect the rest of the bus network.

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Bus Network Topology

Disadvantages of Bus Network:

i. Network disruption might occur when computer or other devices are added or removed.

ii. Because all systems on the network connect to a single cable or backbone, a break in the cable will prevent all systems from accessing the network.

iii. It is difficult to identify the problem if the entire network shut down.

iv. If number of computer increase,speed of network will b slow.

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Ring Network Topology

Ring Network Topology: On a ring network, a cable forms a closed loop

(ring) with all computers and devices arranged along the ring.

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Ring Network Topology…cont.

Data transmitted on a ring network travels from device to device around the entire ring, in one direction.

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Ring Network Topology

Advantages of Ring Network:

i. The transmission of data is relatively simple as packets travel in one direction only.

ii. Cable faults are easily located, making troubleshooting easier.

iii. Every computer has equal access to network.

iv. Less expensive.

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Ring Network Topology

Disadvantages of Ring Network:

i. A failure in any cable or device breaks the loop and can take down the entire network.

ii. Data packets must pass through every computer therefore, this makes it slower.

iii. A ring network can span a larger distance than a bus network, but it is more difficult to install.

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Types of Network Topology

• Star Topology.

A devices that provides a common central connection point for nodes on the network is hub.

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Star Network Topology

Working of Star Network Topology:

Hub

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Star Network Topology…cont.

Hub: A device that provides a common central connection

point for other devices on a network. All data that transfer from one device to another passes

through the hub.

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Star Network Topology

Advantages of Star Network:

i. If one device fails, only that device is affected.

ii. Devices can be added to or removed from network with little or no disruption.

iii. Easy to troubleshoot and isolate problem.

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Star Network Topology

Disadvantages of Star Network:

i. If the hub fails, the entire network will be inoperable

ii. More expensive because the cost of the hub.

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Case Study 1

MoneyMaker Bank at Mumbai want to implement a network at their office.They have good budget so they can afford costly network. Their requirments are time to time connectivity is easily available in short period of time and minimum amount of problems in the network because they do not afford disturbance in network .There are 30 employs in the office and everyone can easily access to others and share information.

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Problem

Need to select topology that fulfill their network needs.

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Suggested Solution

• Bus topology

• Ring topology

• Star topology

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THANKYOU