Idea of Roles of computer in a Network

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Roles of computer in a Network

Roles of computer in a Network

Clients

1. Use Network resources but do not share them

Peers

1. Use and Network resources

Servers

1. Provide network resources

On the base of the roles, networks are divided into three categories :

A. Peer–to-peer networks

B. Sever-based networks

C. Combination networks

A. Peer–to-peer networks

1.  Dose not have a central control over the network

2. Computers are clients as well as servers

3. Does not have any dedicated server

4. Is organized into workgroups that have limited security control

Offers the following advantages:

1. No extra investment on server hardware and software

2. Easy setup

3. No network administrator required

4. Users can controls sharing of resources

5. Less cost

Have the following disadvantages:

1. Weak and intrusive security

2. Need to administrator the computers

3. Lack of  centralized management

4. Additional burden on the computers because of resources sharing

5. Non-handing of multiple network connections

B. Servers-based Networks

Are organized into domains on a environment that provide:

1. Security

2. Administrator

3. Provide service to various clients

4. Ensure security of files and directories

Offers the following advantages:

1. Strong central security

2. Centralized file storage that:

– Provides easy backup of critical data

– Allows users to work the same set of data

3. Reduced overall costs

4. Easy management of multiple users

5. Users are freed from managing resources

Have the following disadvantages:

1. Expensive dedicated server

2. Expensive network operating System software

3. Need for a dedicated network administrator

Servers are dedicated to perform specific tasks

1. May perform all the tasks

2. Or have separate servers for each task

Servers are classified into:

1. File server that allow users to share files

2. print  server that allow users to print on a common network printer

3. Application servers that allow clients to access expensive software applications

4. Message servers that provide message services

C. Combination Networks

1. Combine server-based and peer-to-peer networking features

2. Can be implemented by using two types of operating systems on the same network

3. Require extensive planning and training of the users to implement the network and security issues

Network Protocols

A protocol is a standard that regulates the transmission of data between computers. There are different types of protocols to communicate between computers like.

1. TCP/IP

2. NwLink

3. Apple Talk

4. NetBEUI

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