Networking Interview Questions and Answers

1. Define Network?
   A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.
2. What is a Link?
   At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Link.
3. What is a node?
   A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes.
   
4. What is a gateway or Router?
   A node that is connected to two or more networks is commonly called as router or Gateway. It generally forwards message from one network to another.
5. What is point-point link?
   If the physical links are limited to a pair of nodes it is said to be point-point link.