Network Topology

SEMINAR ON

NETWORK TOPOLOGY

NAME:ABHINAV SINGH BRANCH:CSROLL NO:02

ABSTRACT

• Although the computer industry is youngest ,the major part of this spectacular progress is contributed by networking.To get acquainted with networks you must know about:

Network topologies

• INTRODUCTION• CONTENT• Hubs• Switch• Advantages & disadvantages

INTRODUCTION• WHAT IS IT?

A Network is a set of devices connected by media links. These devices are termed as Nodes. A Node can be any device which is capable of sending and/or receiving data from/to other Nodes. The links are called communication channels.

CONTENT

MAIN MENU SUMMARY EXITEXERCISEOBJECTIVE

Definition of Network Topology

Types of Network Topology

Differentiation Between theTypes of Network Topology

DEFINITION

What is a Topology ?

The physical topology of a network refers to the configuration of cables, computers and other peripherals.

TYPES OF NETWORK TOPOLOGY

Three commonly used network topologies are:-

Bus network.

Ring network.

Star network.

STAR TOPOLOGY

All devices connect to acentral device, calledhub.

All data transferredfrom one computer toanother passes through hub.

STAR TOPOLOGY

BUS TOPOLOGY

All computers and devices connected to central cable or bus.

Consists of a main run of cable with a terminator at each end.

Popular on LANs because they are inexpensive and easy to install.

BUS TOPOLOGY

RING TOPOLOGY

Cable forms closed ring or loop, with all computers and devices arranged along ring.

Data travels from device to device around entire ring, in one direction.

Primarily is used for LANs, but also is used in WANs.

RING TOPOLOGY

ADVANTAGES :•NO TRAFFIC PROBLEMS

•PRIVACY AND SECURITY

• EASY FAULT IDENTIFICATION & ISOLATION

•ROBUST

DISADVANTAGES:• MORE CABLES REQUIRED

• MORE SPACE CONSUMPTION

• EXPENSIVE HARDWARE

• MORE I/O NODES

• DIFFICULT INSTALLATION & CONFIGURATION

TREE TOPOLOGY

Server

Types of HubsPassive Hubs:- It simply receive data

from one port of the hub and send it to the other ports.

Active:- It provide the same functionality of a passive hubs with an additional features . Active hubs repeating the data while resending it to all of the ports.

Switches• A common solution to traffic

problems is to implement switches.

• Switches also referred to as multi port bridges.

• Automatically determines the MAC address of the device connect to each port of the switch.

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY

WHAT IS DIFFERENTIATION BETWEEN THE THREE OF NETWORK TOPOLOGY?

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY

http://en.wikipedia.org/wiki/Network_topology

http://home.att.net/~charlie.net/cMctopology.htm

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY

ADVANTAGE DISADVANTAGE

1) Easy to install and wire. 1) Requires more cable length

than a linear topology. 2) Security can be implemented in the hub/switch.

2) If the hub or concentrator fails, nodes attached are disabled.

3) Easy to detect faults and to remove parts.

3) More expensive than linear bus topologies because of the cost of the concentrators.

STAR

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY

ADVANTAGE DISADVANTAGE

1) Easy to connect computer or peripheral to a linear bus.

1) Entire network shuts down if there is a break in the main cable.

2) Requires less cable length than a star topology.

2) Terminators are required at both ends of the backbone cable.

3) Difficult to identify the problem if the entire network shuts down.

BUS

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY

ADVANTAGE DISADVANTAGE

1) Data is quickly transferred without a ‘bottle neck’.

1) Data packets must pass through every computer

between the sender and recipient therefore, this makes it slower.

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

2) If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. 3) It is difficult to troubleshoot the ring.

RING

SUMMARY

BUS TOPOLOGY

DEFINITION•All computers

and devices connected to central cable

ADVANTAGE•Easy to connect a

computer or peripheral to a linear

bus.

•Requires less cable length than

a star topology.

DISADVANTAGE

•Entire network shuts down if

there is a break in the main cable.

•Terminators are required at both

ends of the backbone cable.

•Difficult to identify the problem

if the entire network shuts down.

SUMMARYRING TOPOLOGY

DEFINITION•Cable forms closed ring or loop, with all

computers and devices arranged

along ring.

ADVANTAGE•Data is quickly

transferred without a ‘bottle neck’.

•The transmission of data is relatively

simple as packets travel in one direction

only.

DISADVANTAGE

•Data packets must pass through every computer between the sender and recipient therefore, this

makes it slower.

•If any of the nodes fail then the ring is broken

and data cannot be transmitted successfully.

•It is difficult to troubleshoot

the ring.

SUMMARY

DEFINITION•All devices connect to a

central device, called hub.

ADVANTAGE•Easy to install and

wire.

•Security can be implemented

in the hub/switch.

DISADVANTAGE•Requires more cable

length than a linear topology.

If the hub or concentrator fails,

nodes attached are disabled.

More expensive than linear bus topologies because of the cost of

the concentrators.

STAR TOPOLOGY

•Easy to detect faults and to

remove parts

Thank You !!!!t