Different types of internetworking and devices used to interconnect dissimilar networks

Internetworking : There are different types of networks such as Local Area Network(LAN),Wide Area Network(WAN),A variety of protocols are used at every layer and interconnection of these networks is called internet.Through internet it is possible to exchange information between hosts which are connected across various networks.

Various kinds of protocols are TCP/IP,SNA (system Network Architecture),DECnet developed by Digital Electronic Corporation,personal computers are interconnected using,Novel,NCP/IPX or APPLETALK.Similarly ATMs are developed for real-time applications.

In internetworking there are various types of networks and their scenarios.There are basically four types of scenarios.

1. LAN-LAN
2. LAN-WAN
3. WAN-WAN
4. LAN-WAN-LAN.

1.LAN-LAN : To exchange information between two departments of the same organization which are present on different host at different network. By using bridges we can interconnect different LANs.

2.LAN-WAN : To send information to a remote host which is connected through wide area network,transferring information from LAN to WAN.

3.WAN-WAN : For transferring information between two different organizations.

4.LAN-WAN-LAN : For international organizations which host on different branches communicate with each other.The information generated by first LAN will be transmitted to another LAN through wide area network.