basicconceptofcomputernetwork-131230044611-phpapp02

8/12/2019 basicconceptofcomputernetwork-131230044611-phpapp02

1/21

Introductionasic Concept ofComputer NetworkBITS edu campus


2/21

Definition of Computer network

A Computer networkis a collection of computers and

devices Connected together via communication

devicesand transmission media. For example it myconnect computers, printers and scanners.


3/21

Definition of Network Communication

Communicationdescribes a process in which two or more

computer, devicestransfer data, instructions and

information.


4/21

Advantage of Computer networks Sharing of Devicessuch as printer and scanner Sharing program/ software Sharing files Sharing data Sharing information Sharing of single high-speed internet

connection Better communicationusing internet services

such as email, mailing list and internet Relate chat(IRC)


5/21

Disadvantage of Computer Network The larger network becomes, the more difficult it

is to manage.

If the network stops operating system, then it maynot be possible to access various resources

Computer Viruses: If any computer system in a

network gets affected by computer virus, there isa possible threat of other systems getting affected

too.


6/21

Sharing DataFile server contains documents

used by other computers.


7/21

Types of Network


8/21

Local Area Network (LAN)

A local area networkis a network that connectscomputers and devices in a limited geographically

areasuch as a home, school computer laboratory,

office building.


9/21

Metropolitan Area Network (MAN) Metropolitan Area Network(MAN) is high speed

network that connect local area network in MetropolitanAreasuch as city or townand handles bulk of

communication activity across the region. A MAN typically includes one or more LAN but covers a

smaller geographically area than a WAN.


10/21

Wide Area Network (WAN)

Wide Area Network is a network that covers a largegeographically areasuch countryor the world

WAN combines many types of media such as telephonelines, cables and radio wave.

A WAN can be one large network or can consist of two ormore LANs connected together.


11/21

Difference Between the types of Computer

network


12/21

Network Architecture

Network Architectureis the over alldesign ofa computernetwork that describes how acomputer network is configured and whatstrategies are being used.

It also know as network modelor networkdesign.

Two main network architecture:


13/21

Server and Clients

A network server is a computer designed to process

requests and deliver data to other (client) computers

over a local network or the Internet. A Clientis a computer that

retrieves information

from or uses resources

provided by a server

or main computer.

9A-13


14/21

Difference Between Server, Client and Peer

to Peer

9A-14


15/21

Network Communication Technology State the types of network communication technology:

i) Intranet

ii) Extranet

iii) Internet

9A-15


16/21

Types of Network Communication

9A-16


17/21

Intranet An intranet is a private network within an organization that

resembles the internet.

organizations use intranets to provide information to theiremployees.

typical applications include electronic telephone directories,

email addresses,

employee information,

internal job openings

and much more.

9A-17


18/21

Extranet

Is a private network that connects more than oneorganizations

many organizations use the internet technologies to allow

suppliers, customers and business partner limited access to

their network

the purpose is to increase efficiency and reduce costs

9A-18


19/21

Internet

is a public network

it is worldwide collection of networks that links million of

business, government agencies, educational institution and

individuals. internet users can access service like web browsing, email, file

transfer, mailing list, chat rooms, instant messaging and

newsgroups.

9A-19


20/21

Difference Between Internet, Intranet and Extranet

Differences Intranet Extranet Internet

Used for Private Private Public

Types of users Provide information

for organization

employees

Provide information to

suppliers, customers

and business partner

Provide

information for

public

Usages Telephone

directories, internal

job opening,

employee information

Access data, check

status, place orders,

send email

Access all kinds of

information

Security High Use virtual private

network (VPN)

technology to

communication over the

internet more secure

Loose

9A-20


21/21

TH NK`SNYQUESTION

Prepared by: EngAbdirahman Hassan Nour Golis University Berbera

basicconceptofcomputernetwork-131230044611-phpapp02

Documents

Transcript of basicconceptofcomputernetwork-131230044611-phpapp02