Network Topology

Basic Concepts of Computer Networks and Communications 3.1.5 Network Topology

Main Menu OBJECTIVE CONTENT EXERCISE SUMMARY EXIT

At the end of this lesson, student should be able to achieve all the three objective below:- OBJECTIVE MAIN MENU SUMMARY EXIT EXERCISE CONTENT At the end of this lesson, student should be able to achieve all the three objective below:- Explain meaning of network topology with correctly. State three types of network topologies correctly. Differentiate correctly between the three types of network topology.

CONTENT MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE Definition of Network Topology Types of Network Topology Differentiation Between the Types of Network Topology

DEFINITION What is a Topology ? The physical topology of a network refers to the configuration of cables, computers and other peripherals. MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

TYPES OF NETWORK TOPOLOGY Three commonly used network topologies are:- Bus network. Ring network. Star network. MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

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. MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

BUS TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

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.

MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

RING TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

STAR TOPOLOGY

All devices connect to a

central device, called

hub.

All data transferred

from one computer to

another passes through

hub.

MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

STAR TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE WHAT IS DIFFERENTIATION BETWEEN THE THREE OF NETWORK TOPOLOGY? SEARCH IN THE INTERNET

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE http://en.wikipedia.org/wiki/Network_topology http://home.att.net/~charlie.net/cMctopology.htm

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE BUS 2) Terminators are required at both ends of the backbone cable. 2) Requires less cable length than a star topology. 1) Entire network shuts down if there is a break in the main cable. 1) Easy to connect computer or peripheral to a linear bus. 3) Difficult to identify the problem if the entire network shuts down. DISADVANTAGE ADVANTAGE

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE RING 2) If any of the nodes fail then the ring is broken and data cannot be transmitted successfully. 2) The transmission of data is relatively simple as packets travel in one direction only.

Data packets must pass through every computer

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

1) Data is quickly transferred without a ‘bottle neck’. 3) It is difficult to troubleshoot the ring. DISADVANTAGE ADVANTAGE

DIFFERENTIATION BETWEEN THE THREE TYPES OF NETWORK TOPOLOGY MAIN MENU SUMMARY EXIT EXERCISE OBJECTIVE STAR 2) If the hub or concentrator fails, nodes attached are disabled. 2) Security can be implemented in the hub/switch. 1) Requires more cable length than a linear topology. 1) Easy to install and wire. 3) More expensive than linear bus topologies because of the cost of the concentrators. 3) Easy to detect faults and to remove parts. DISADVANTAGE ADVANTAGE

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE 1) Which of the following statements describe about network topology correctly ? A . Devices attached or detached at any point on the network. B . The failure of device on the network. C . Refers to the configuration of cables, computers and other peripherals. D . All of the above.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE

On a __________, all of the computers and devices (nodes) on the network connect to a central device.

A . Bus network.

B . Ring network.

C . Star network.

D . All of above.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE

On a star network, the central

device that provides a common connection point for nodes on the network is called the __________.

A . Hub.

B . Personal computer.

C . Printer.

D . File server.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE 4) On a bus network, such as that illustrated in the accompanying figure, if one node fails ________. A . Only that node is affected. B . Only the nodes before that node are affected. C . Only the nodes after that node are affected. D . All the nodes are affected.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE The transmission of data is relatively simple as packets travel in one direction only . 5) The statement above is correctly refer to the ______.

A . Bus network.

B . Ring network.

C . Star network.

D . All of the above.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE 6) All the statements true about ring topology except

A . Data is quickly transferred without a ‘bottle neck’.

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

C . If any of the nodes fail then the ring is broken and data cannot be transmitted successfully.

D . Security can be implemented in the hub/switch.

EXERCISE MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE 7) The statement true about star topology is A . Difficult to identify the problem if the entire network shuts down. B . Terminators are required at both ends of the backbone cable. C . The transmission of data is relatively simple as packets travel in one direction only. D . Easy to detect faults and to remove parts.

ANSWER MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE YOU ANSWER IS WRONG, TRY AGAIN !!! SORRY!! QUESTION 1 QUESTION 2 QUESTION 3 QUESTION 4 QUESTION 5 QUESTION 6 QUESTION 7

ANSWER WELL DONE YOU ANSWER IS CORRECT !!! QUESTION 1 QUESTION 2 QUESTION 3 QUESTION 4 QUESTION 5 QUESTION 6 QUESTION 7 MAIN MENU SUMMARY EXIT CONTENT OBJECTIVE

SUMMARY MAIN MENU EXERCISE EXIT CONTENT OBJECTIVE 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.

SUMMARY MAIN MENU EXERCISE EXIT CONTENT OBJECTIVE RING 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 MAIN MENU EXERCISE EXIT CONTENT OBJECTIVE

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