Networking Questions and Answers for Interview

1. What is Computer Networking?
A computer network is a set of computers connected together for the purpose of sharing resources. The most common resource shared today is connection to the Internet.

2. 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.

3. What is a Link?
The link is the physical and logical network component used to interconnect hosts or nodes in the network and a link protocol is a suite of methods and standards that operate only between adjacent network nodes of a local area network segment or a wide area network connection.

4. What is a node?
A node is a point of intersection/connection within a network. In an environment where all devices are accessible through the network, these devices are all considered nodes. The concept of nodes works on several levels, but the big-picture view defines nodes as the major centers through which Internet traffic is typically routed. This usage is somewhat confusing, as these same Internet nodes are also referred to as Internet hubs.

5. What is a gateway or Router?
A gateway is a node (router) in a computer network, a key stopping point for data on its way to or from other networks. Thanks to gateways, we are able to communicate and send data back and forth. The Internet wouldn't be any use to us without gateways (as well as a lot of other hardware and software).

6. What is point-point link?
A point-to-point connection refers to a communications connection between two nodes or endpoints. An example is a telephone call, in which one telephone is connected with one other, and what is said by one caller can only be heard by the other.

7. What is Multiple Access?
If the physical links are shared by more than two nodes, it is said to be Multiple Access. Multiple access method allows several terminals connected to the same multi-point transmission medium to transmit over it and to share its capacity

8. Name the factors that affect the security of the network?
a. Unauthorized Access
b. Malware c. Viruses

9. What are the advantages of Distributed Processing?
a. Security/Encapsulation
b. Distributed database
c. Faster Problem solving
d. Security through redundancy
e. Collaborative Processing

10. What are the criteria necessary for an effective and efficient network?
a) Performance: It can be measured in many ways, including transmit time and response time.
b) Reliability: It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network's robustness.
c) Security: Security issues includes protecting data from unauthorized access and virues.

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Networking Questions and Answers for Interview