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Introduction Types of Computer Network

 

What is a Computer Network?

Computer networks is bunch of computers connected through optical cables, wires and fibers so that it interacts with each other through networks. The goal is to share the content and the information among the system of same network or other. In computer networks there are different types of networks that shares the information among each other they maybe simplex or complex ones.


Computer Network Components Includes:-

  1.  National interface card 
  2.  Hubs
  3.  Switches
  4.  Modem
  5.  Routers
  6.  Cables & Connectors

Major components of a computer network are:

NIC(National interface card)

NIC is a device that helps out the network to reach proper address .As It contains Hardware address which provides a reference to the network after that network eventually checks whether the address of input given by client matches with that hardware address or not once it matches network gets connected. The Data-Link Layer of the network analyze this address to connect the system or to identify the network attached in the newtork.

There are two types of NIC:-

  1. wired eg:- wired computers connected in some topology
  2. wireless eg:- laptops

Hub

Hub is like a junction from where the data packets travels to all interconnected PC's where data is stored once the computer requests from the information that requests gets into the hub after that hub will splits that requests into the interconnected PC's so Hub is just a connection of many different interconnected PC's.

Switches

Switch is far better than hub as it sends data from directly source to destination. On the other hand hubs sends data or broadcast the data on all the interconnected devices switches directly sends the data to the proper destination.

Router

Routers are basically used for connecting different or distinct networks or to connect LAN to Internet LAN means Local Area network.

Modem

Modem connects computer with the Internet over the existing telephone connections. It is separate component used to access internet or connect the computers.


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