6738495 project on network

8/8/2019 6738495 Project on Network

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GOVT. GIRLS SR. SEC.GOVT. GIRLS SR. SEC.SCHOOL,BASTISCHOOL,BASTI

SHEIKH,JALANDHARSHEIKH,JALANDHAR



PROJECT ON NETWORKPROJECT ON NETWORK

SUBMITTED BY :SUBMITTED BY :

SANA,SHEETAL,NEHA.SANA,SHEETAL,NEHA.



WHAT IS COMPUTER NETWORKWHAT IS COMPUTER NETWORK

A computer network means A computer network meansinterconnection of two or more computersinterconnection of two or more computersby communication medium that areby communication medium that are

connected to share the information andconnected to share the information andresources. The computers in a networkresources. The computers in a networkare connected by several communicationare connected by several communicationmediums like telephone lines, coaxialmediums like telephone lines, coaxialcables etc. The system or node on thecables etc. The system or node on thenetwork can be connected in number of network can be connected in number of ways that is defined by µTOPOLOGY¶.ways that is defined by µTOPOLOGY¶.



ADVANTAGES OF NETWORK ADVANTAGES OF NETWORK

The Advantages of NETWORK can be summarized as:The Advantages of NETWORK can be summarized as:

1.1. SharingSharing : The network enables to share all data and: The network enables to share all data andprograms along with different resources irrespective of programs along with different resources irrespective of physical location of the resource and the user.physical location of the resource and the user.

2.2. Communication mediumCommunication medium: The networks provide very: The networks provide veryfast and effective communication mediums.fast and effective communication mediums.

3.3. File integrityFile integrity: The file transfer and sharing is very: The file transfer and sharing is veryfrequent and immediate file updating in networks. Thusfrequent and immediate file updating in networks. Thus

maintains the integrity of file and saves time.maintains the integrity of file and saves time.4.4. Cost effectiveCost effective: The network allow to share the: The network allow to share the

resources of expensive peripheral devices like printers.resources of expensive peripheral devices like printers.Thus decreasing the overall cost of the system.Thus decreasing the overall cost of the system.



5.5. ReliableReliable: The network provides the reliability by: The network provides the reliability by

providing multiple sources of supply.providing multiple sources of supply.

6.6. Greater flexibilityGreater flexibility: Networks provide greater flexibility: Networks provide greater flexibilitybecause of possibility to connect devices from variousbecause of possibility to connect devices from various

vendors.vendors.

7.7. BackuBackup : It is easier to backup the files from the centralp : It is easier to backup the files from the central

file server instead of from the scattered workstationfile server instead of from the scattered workstation8.Security: Networks provides security measures so as to8.Security: Networks provides security measures so as to

ensure that the network user may only have access toensure that the network user may only have access to

certain files and applications.certain files and applications.



COMPONENTS OF NETWORKCOMPONENTS OF NETWORK

1.1. CLIENT or NODE:A client or node means computer CLIENT or NODE:A client or node means computer that is attached to a network for resource sharing.that is attached to a network for resource sharing.

2.2. SERVER: A server is a computer that helps or controlsSERVER: A server is a computer that helps or controlsthe sharing information and resources on the network.the sharing information and resources on the network.

3.3. NETWORK INTERFACE CARD: A network interfaceNETWORK INTERFACE CARD: A network interfaceunit is card that should be present on each and everyunit is card that should be present on each and everyclient and server. This card basically establishes theclient and server. This card basically establishes thecommunication connection between the server andcommunication connection between the server andnodes.nodes.

4.4. COMMUNICATION CHANNEL: The communicationCOMMUNICATION CHANNEL: The communicationchannel refers to the connecting wires. This can bechannel refers to the connecting wires. This can beactual physical wires or transmission through air.actual physical wires or transmission through air.



NETWORK TOPOLOGYNETWORK TOPOLOGY

There are number of network topologies butThere are number of network topologies but

most common are: STAR, RING and BUSmost common are: STAR, RING and BUS

topology.topology.The selection of these topologies totallyThe selection of these topologies totally

depends on three factors:depends on three factors:

Number of nodes on the networkNumber of nodes on the network

PerformancePerformance

Reliability and Expandability.Reliability and Expandability.



STAR TOPLOGYSTAR TOPLOGYIn star topology ,all computers are placed around a centralIn star topology ,all computers are placed around a central

hub. The hub controls the communication between thehub. The hub controls the communication between the

computers and other hubs. The computers communicatecomputers and other hubs. The computers communicate

with each other through hub and not directly. The nodeswith each other through hub and not directly. The nodes

can only be about 100 meters far from the hub.can only be about 100 meters far from the hub.



RING TOPOLOGYRING TOPOLOGY

In RING Topology ,all computers are connected logically in the form of In RING Topology ,all computers are connected logically in the form of

a ring i.e. each node is connected to two other nodes, one on either a ring i.e. each node is connected to two other nodes, one on either

side, for communication. There is no master node or hub in theseside, for communication. There is no master node or hub in these

networks for controlling the communication. On receiving the data,networks for controlling the communication. On receiving the data,

each machine checks the address attached to it. If it is for thateach machine checks the address attached to it. If it is for thatmachine then it takes the data otherwise simply discard it.machine then it takes the data otherwise simply discard it.



BUS TOPOLOGYBUS TOPOLOGY

A bus topology consists of a shared bus on which all other A bus topology consists of a shared bus on which all other

computers and other devices are attached. A device who wants tocomputers and other devices are attached. A device who wants to

communicate with another device on the network sends a broadcastcommunicate with another device on the network sends a broadcast

message on shared bus. All other devices on the network can seemessage on shared bus. All other devices on the network can see

the message but only the intended receiver will actually accept andthe message but only the intended receiver will actually accept and

process the message.process the message.

6738495 project on network

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