Answer to Question #131881 in Computer Networks for Danish Hassan

Question

Design a high level network model showing connectivity structure starting from backbone ISPs and their router and down to local ISP and to local network including end systems, on each route mention suitable protocol to use and implement Autonomous Systems (AS) and define subnets for end users

Answer 1

The main ISP is the backbone of internet communications. The main ISp is responsible for providing the internet.

The main ISP is linked to another small local ISP. On each route of transferring There are two types of protocol to be followed-

1)IGP(Internet gateway Protocol)

2)EGP(Exterior gateway Protocol)

On each route of data transfere There is exterior gateway protocol between The main ISP to local ISP. The IGP is used in between local ISP to end users.

An Autonomous System (AS) is a collection of routers whose prefixes and routing policies are under common administrative control.

Subnets ,subnetwork or subnet is a logical subdivision of an IP network.

for each end Users There are various sunnetworka having different IP addresses.