Best 5 Networking Interview Questions and their Answers.

Basic Common Computer IT Networking Interview Questions:In this article, we have covered the most common basic computer IT networking interview questions and answers for freshers as well as the experienced professionals.

Q #1) Differentiate Communication and Transmission?

Ans) Through Transmission the data gets transferred from source to destination (Only one way). It is treated as the physical movement of data.

Communication means the process of sending and receiving data between two media (data is transferred between source and destination in both ways).

Q #2) Explain various types of networks based on their sizes?

Ans) Size of the Network is defined as the geographic area and the number of computers covered in it. Based on the size of the network they are classified as below,

Based on the size of the Network they are classified as below,

• Local Area Network (LAN): A network with a minimum of two computers to a maximum of thousands of computers within an office or a building is termed as LAN.Generally, it works for a single site where people can share resources like printers, data storage etc.
• Metropolitan Area Network (MAN): It is larger than LAN and used to connect various LAN’s across small regions, a city, campus of colleges or universities etc which in turn forms a bigger network.
• Wide Area Network (WAN): Multiple LAN’s and MAN’s connected together form a WAN. It covers a wider area like a whole country or world.

Q #3) Few important terminology we come across networking concepts?

Ans) Below are few important terms we need to know in networking

• Network – A set of computers or devices connected together with a communication path to share data.
• Networking – The design and construction of a network are termed as networking.
• Link – The physical medium or the communication path through which the devices are connected in a network is called as a Link.
• Node – The devices or the computers connected to the links are named as nodes.
• Router / Gateway – A device/computer/node that is connected to different networks is termed as a Gateway or Router. The basic difference between these two is that Gateway is used to control the traffic of two contradictory networks whereas router controls the traffic of similar networks.
• The router is nothing but a switch which processes the signal/traffic using routing protocols.
• Protocol – A set of instructions or rules or guidelines that are used in establishing communications between computers of a network is called as Protocol.
• Unicasting – When a piece of information or a packet is sent from a particular source to a specified destination then it is called as Unicasting.
• Anycasting – Sending the datagrams from a source to the nearest device among the group of servers which provide the same service as the source is termed as Anycasting.
• Multicasting – Sending one copy of data from a single sender to multiple clients or receivers (selected clients) of the networks which are in need of such data.
• Broadcasting – Sending a packet to each device of the network is termed as broadcasting.

Q #4) How many types of modes are used in data transferring through networks?

Ans) Data transferring modes in computer networks are of three types. They are listed below,

1) Simplex: Data transferring which takes place only in one direction is called Simplex. In Simplex mode, the data gets transferred either from sender to receiver or from receiver to sender.

Eg: Radio signal, the print signal given from computer to printer etc.

2) Half Duplex: Data transferring can happen in both directions but not at the same time. Alternatively, the data is sent and received.

Eg: Browsing through the internet, a user sends the request to the server and later the server processes the request and sends back the web page.

3) Full Duplex: Data transferring happens in both directions that too simultaneously.

Eg: Two lane road where traffic flows in both the directions, communication through telephone etc.

Q #5) Define Piggybacking?

Ans) In data transmission if the sender sends any data frame to the receiver then the receiver should send the acknowledgment to the sender. The receiver will temporarily delay (waits for the network layer to send the next data packet) the acknowledgment and hooks it to the next outgoing data frame, this process is called as Piggybacking