project of computer topologies

7/28/2019 Project of Computer TOPOLOGIES

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THE BISHOP

SCHOOL, CAMP

COMPUTER PROJECTON

TOPOLOGIES


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BY: ANSH SHATANI

ROLL NO. 43

DIV:- VI-B


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TOPOLOGIES AND THEIR TYPES

Different Kinds Of Network Topology In ComputerNetworks

The way in which the connections are made is called the

topology of the computer network. Now I am

discussing about network topology,Network

topology specifically refers to the physical layout of the

network, especially the locations of the computers and how

the cable is run between them.

FIVE MOST COMMON TOPOLOGIES ARE:

BUS

STAR

RING MESH

TREE
http://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.htmlhttp://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.htmlhttp://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.html


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BUS TOPOLOGY:

Bus topologies

All the devices on a bus topology are connected by one single cable.

When one computer sends a signal up the wire, all the computers on

the network receive the information, but only one accepts the

information. The rest regrets the message. One computer can send a

message at a time. A computer must wait until the bus is free before it

can transmit. When the signal reaches the end of the wire, it bounces

back and travels back up the wire. When a signal echoes back and forth

along an unterminated bus, it is called ringing. To stop the signals from

ringing, attach terminators at either end of the segment. The

terminators absorb the electrical energy and stop the reflection.
http://1.bp.blogspot.com/-WNbKMFtl-p0/UA-lBbe9j1I/AAAAAAAAAHs/cpS5V_A1dwk/s1600/bus_topology.jpg


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STAR TOPOLOGY:

Star TopologyAll the cables run from the computers to a central location, where they

are all connected by a device called a hub. Each computer on a star

network communicates with a central hub that resends the message

either to all the computers or only to the destination computers. Hub

can be active or passive in the star network Active hub regenerates theelectrical signal and sends it to all the computers connected to it.

Passive hub does not amplify or regenerate signal and does not require

electrical power to run. We can expand a star network by placing

another star hub.
http://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.htmlhttp://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.htmlhttp://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.htmlhttp://1.bp.blogspot.com/-f1_JocDm57Y/UA-rnslcCCI/AAAAAAAAAIA/jVQ9wo3hIgE/s1600/star+topology.jpghttp://ecestudyaid.blogspot.com/2012/07/different-kids-of-network-topology-in.html


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RING TOPOLOGY:

Ring TopologyEach computer is

connected to the next

computer ,with the last

one connected to the

first. Every computer is

connected to the next

computer in the ring,

and each retransmits

what it receives from the

previous computer. The message flow around the ring in one direction.

Some ring networks do token passing. It passes around the ring until a

computer wishes to send information to another computer. The

computer adds an electronic address and data and sends it around the

ring. Each computer in sequence receives the token and the

information and passes them to the next until either the electronic

address matches the address of the computer or the token returns to the

origin. The receiving computer returns a message to the originator

indicating that the message has been received. The sending computer

then creates another token and place it on the network, allowing

another station to capture the token and being transmitted.
http://1.bp.blogspot.com/-5yh0peyUJig/UA-t77rV09I/AAAAAAAAAIM/ceKhsjWCCPs/s1600/RingTopology[1].jpg


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MESH TOPOLOGY:

MeshTopology

The mesh

topology

connects all

devices

(nodes) to

each other

for

redundancy

and fault

tolerance. It

is used in WANs to interconnect LANs and for mission

critical networks like those used by banks and financial

institutions. Implementing the mesh topology is expensive

and difficult.
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TREE TOPOLOGY

Among all the Network Topologies we can derive that the Tree

Topology is a

combination of

the bus and the

Star Topology.

The tree like

structure allows

you to have

many servers

on the network

and you can

branch out the

network in

many ways.

This is

particularly helpful for colleges, universities and schools so that each

of the branches can identify the relevant systems in their own network

and yet connect to the big network in some way.

A Tree Structure suits best when the network is widely spread and

vastly divided into many branches. Like any other topologies, the Tree

Topology has its advantages and disadvantages. A Tree Network may

not suit small networks and it may be a waste of cable to use it for

small networks. Tree Topology has some limitations and the

configuration should suit those limitations.

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