Networking Concepts and Applications
Networking is a group of computers and other devices connected to exchange data. Each device on the network is called as node which has a unique address. But in the modern networks, data are transferred using packet switching.
-Messages are broken into units called packets, and sent from one computer to the other.
-At the destination, data are extracted from one or more packets and used to reconstruct the original message.
-Each packet has a maximum size, and consists of a header and a data area.
-The header contains the addresses of the source and destination computers and sequencing information necessary to reassemble the message at the destination.
Some of the networking concepts are :
IP address is short for Internet Protocol Address. An IP Address is a unique number that devices use in order to identify and communicate with each other on a computer network. If two computers have the same IP addresses, it will cause conflict and cause problem.
Broadband router :
The purpose of a broadband router is to share an internet connection among several computers. The broadband router will get one public IP from your ISP and assign dynamic private IP address to each of your computer. All of your computers will have unique private IP address but will use the same public IP address to browse Internet. The router provides a basic Firewall which can deny access to your local computers from Internet.
Peer to peer networks:
Peer to peer networks share responsibility for processing data among all of the connected devices. Peer-to-peer networking (also known simply as peer networking) differs from client-server networking in several respects.
Speed of a computer network:
The performance or “speed” of a computer network is normally measured in units of bits per second (bps). This quantity can represent either an actual data rate or a theoretical limit to available network bandwidth. The related units of Kbps, Mbps, Gbps represent increasingly larger multiples of bps.