Computer Networks

Viva Questions:

Q1) Define Network?

Ans:  A Network is a set of devices connected by physical media links. A network is recursively a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.

Q2) What is a link?

Ans: 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.

Q3) What is a Gateway or Router?

Ans: 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.

Q4) What is Point to Point Link?

Ans: If the physical links are limited to a pair of nodes it is said to be point to point link.

Q5) What is Multiple Access?

Ans: If the Physical links are shared by more than two nodes, it is said to be multiple access.

Q6) What is a Node?

Ans: A network can consist of two or more computers directly connected by some physical medium such as coaxial cables or optical fiber. Such a physical medium is called as links and the computer it is connected is called as Nodes.

Q7) What are the key elements of protocols ?

Ans: Key elements of protocol are:
        a) Syntax: It refers to the structure or format of the data, that is the order in which they are                                presented.
        b) Semantics: It refers to the meaning of each section of bits.
        c) Timing: It refers to when data is to be sent and how fast it should be sent.

Q8) What are the design issues of a Computer Network ?

Ans: a) Connectivity
        b) cost- effective resource sharing
        c) support for common services
        d) performance

Q9) Define Routing ?

Ans: The process of determining systematically how to forward messages toward the destination nodes based on its address is called Routing.

Q10) What is Multiplexing ?

Ans: Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link.



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