CLASSIFICATION OF COMPUTER NETWORKS

COMPUTER NETWORKS

CLASSIFICATION OF COMPUTER NETWORKS

A computer network can be divided into two parts -


  • Peer-to-Peer
  • Server Based Networks

This segmentation of the network is done based on its own configuration. And it is also kept in mind how they do the sharing of information. Since a network can be peer-to-peer or server-based, it is necessary to keep the following factors in mind when selecting any class -


  • Size of the Organization
  • Level of Security Required
  • Type of Business
  • Amount of Network Traffic
  • Needs of the Network Users
  • Network Budget

Peer-to-Peer Networks


In a peer-to-peer network, each computer acts as both a client and a server, ie it can perform both request and response. There are no dedicated servers in a peer-to-peer network, nor are hierarchies formed between computers. All computers are equal, hence they are called peers.


In this type of network, the Administrator of the network is not responsible for administering the entire network but it is the responsibility of each user that the data stored on which computer will be shared in the network.


The following Fig. It depicts a Peer-to-Peer Network, with each user acting as both a client and a server.


Computer in Peer-to-Peer Network as client and server


Generally, a peer-to-peer network may have 10 or fewer computers. Hence it is also called Workgroups. A workgroup means a small group of users. Since each computer in Peer-to-Peer Network acts as a client and a server, it does not require a central server. Peer-to-Peer networks are less expensive than server-based networks.


This type of network does not require standards and standards of uniform performance. Peer-to-Peer networking is built into many operating systems, so to install Peer-to-Peer Network, Additional software is also not required. Implementation of a Peer-to-Peer Network in a simple network environment has the following advantages.


  1. Computers are located at the desk of the users.
  2. Users themselves act as Administrators and make their own security plans.
  3. Computers in the network are connected to a simple cabling system.

Users network resources in Peer-to-Peer Network; For example, printers share hard disk and files, but there are no specialized servers. Although peer-to-peer networks cater to all the needs of small institutions; But it is not suitable for all environments. In this type of network, the possibility of future growth is limited.


Under Peer-to-Peer Network Administration, Managing Users, Managing Security, Managing Security, Providing Resources, Making Applications and Maintaining Data (Maintaining Application and Data) and Installing and Upgrading Application and System Software.


In a Peer-to-Peer Network environment, every computer must use its resources to support a user of a computer called a local user, as well as additional resources. ; For example, hard disk space and memory should be used by other users of the network, remote users, to support accessing resources.


In a peer-to-peer network, each computer acts as both a client and a server; Therefore, users need to be trained on their computers to act as users and administrators.


Server-based network


In A Server-based Network, A Computer Is Like A Server And Other Computers Like A Client Let's Do The Work. The Client Computers Send A Request To The Server And In Return The Server Responds To The Client.


This type of network consists of Dedicated Servers. The dedicated server is the computer of any network that acts as a server only, and cannot be used as a client or workstation. Servers are described as Dedicated Servers because they are expected to serve faster for requests made by clients. It is also expected to ensure the safety of files and directories.


As the number of computers increases, i.e. the size of the network increases, the distance between them, and the traffic between them increases, more than one server is required in the network. Distributing networking functions among more than one service ensures that each task is executed in a short time, effectively and easily. In a large server-based network, different types of services are used, which are as follows -


1.File and Print Servers: -


File and print server are used for file and data storage. File and Print Servers manage User Access, Use of File and Printer.


For example - when you use any word-processing software; For example, if you run MS-Word on your computer system, then it is loaded from the file and print server into your computer's memory so that you can use it locally.


2.Application Servers: -


Application Servers provide data to clients. Application servers are different from file and printer servers in the sense that the data requested or downloaded from a file and print server is downloaded to a client (client) computer, whereas the application server, a client (client) is downloaded. ) Sends the result of the request made to the client, ie the result of the request made by the client on the client is downloaded from the application server. , A client application running (Run), accesses data from the application server.


For example, you search the "Employee" database for all employees whose salary is more than 10,000.00. After this, the result of this query is downloaded from the application server to the local computer i.e. the local computer.


3. Mail Server: -


Mail servers also act as application servers, as the server and client application are different and mail on the client computer. ) Are downloaded.


4. Fax Server: -


Through Fax Server, share or share one or more fax modem boards and manage the traffic going to and from the fax.


5.Communication Server: -


Communication servers handle data flow and E-Mail Messages (Handle) between their network and other networks.


6.Directory Services Server: -


Directory Services Server allows users to search, store and protect data and information in the network. For example, some server software; 


Windows NT 4.0 Server (Windows NT 4.0 Server) provides the ability to group computers into different groups. These groups are called domains, which allow any user in the network to access Axis (Resource) on any resource.


 Configure is difficult and complex to manage, yet it has the following advantages over peer-to-peer networks -


  • Sharing Resources: - Sharing of resources refers to the sharing of printers, Hard Disk, Sharing resources. Along with providing access to multiple servers and printers to a server. It is designed to maintain performance and security for the user. In a server-based network, data sharing can be centrally administered and controlled.
  • Data Redundancy: - Data stored on any server in a server-based network may have to be copied to another server. Therefore, backup data can be used to restore data in case of damage to the primary data storage area.
  • Number of Users: - A server-based network can have thousands of millions of users. Due to the currently available monitoring and network management utilities, a server-based network can be operated with a large number of users.

COMPARISON OF PEER-TO-PEER AND SERVER-BASED NETWORKS



Factors

Peer-to-peer network


Server-based network


Size


10 or less is suitable for computers.

Its size depends on the strength of the server, its number, and the hardware used in the network.

Security

Security is installed individually by the user of each computer.

Security is installed centrally by the network administrator.

Administration

Each user is responsible for his / her own administration, so no full-time administrator is required.

The network needs to be centrally administered. Therefore, it requires a skilled administrator.


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