Basic Networking Interview Questions with Answers

Regardless you are a fresher or experienced, if you are preparing for a networking interview, be prepared to face some basic networking questions. This article lists the most frequently asked basic networking interview questions with detailed answers.

What is the Mesh topology and how it is different from other topologies?

Unlike other topologies which describe how devices are physically and logically connected with each other in network, the Mesh topology describes how many connections each device has. There are two types of Mesh topology; fully meshed topology and a partially meshed topology.

What is the difference between a fully meshed topology and a partially meshed topology?

In a fully meshed topology, each node must have a direct connection with other nodes of network. Unlike fully meshed topology, in partially meshed it is not compulsory for each node to have a direct connection with all other nodes.

What is main advantage of Bus topology?

Main advantage of Bus topology is the cost. This topology uses the lowest resources among the other available topologies. A coaxial cable, some connectors and terminators are sufficient to build this topology.

What are the main disadvantages of Bus topology?

Main disadvantage of Bus topology are scalability, troubleshooting and length. A single break in main cable is enough to bring the entire network down. To add worse any loose terminator will also do the same job. Finding a loose terminator or break in cable is the toughest task.

Is ring topology still used in LAN network?

No, the ring topology is no longer used in LAN network.

Which topology is used in modern LAN Network?

Star topology

In which topology all nodes have a direct connection to every other node on the network?

In mesh topology, all nodes have a direct connection with each node in network.

Which network topology uses terminators?

Bus topology uses terminators to absorb the signals at the end of the cable.

Where do we use Straight-through UTP cable?

The straight-through cable is used to connect the following: -

  • Hub / Switch to System
  • Hub / Switch to Router
  • Hub / Switch to Server

Basic Networking Interview Questions with Answers

What is a NIC?

NIC stands for Network Interface Card. NIC is a device which connects computer with the network.

What is the use of a switch in computer network?

In computer network, a switch is used to connect multiple computers together. For example, an 8 ports’ switch allows us to connect 8 computers in a single network.

Why do we do the networking?

We do the networking to share the information, resources and applications.

This article is the second part of the article “Collection of Networking Questions with Answer for Beginners”. Other parts of this article are following.

Networking Interview Questions for Fresher

Networking Interview Questions and Answers

Networking Interview Questions for Experienced

Top 100 Networking Interview Questions with Answers

What is a layer?

Layer is a logical partition of the PDU (protocol data unit) process. Each layer defines a specific functionality. It also defines the devices and protocols which involve in that functionality.

What is an operating system?

Operating system is the main software program in computer. When we turn on a computer, this is the first program which starts. Once started, it controls all system resources.

How many bits are there in 1 byte?

There are 8 bits in 1 byte.

What is an IP address?

IP address is the numeric identity of node in network.

What does a SLB switch do?

A SLB (Server load balancer) switch distributes traffic between multiple servers. It divides requests, destined for the server, among all the servers that are attached with it.

Which computer is considered as a server computer in network?

The computer which provides shared resources to the network is considered as a server computer.

In Windows, what term is used for peer-to-peer network?

In Windows the terms Workgroup and HomeGroup are used to define the peer-to-peer network.

How many computers we can add in a workgroup?

Theoretically, we can add as much computers as we want in workgroup. But practically we should never add more than ten computers in a workgroup network.

What are the differences between hub and switch?

Hub is a Layer1 device. When it receives signals on any of its port, it amplifies them and sends out from all remaining ports. It works in layer 1. It can’t detect the collision.

Switch is a Layer2 device. When it receives signals on any of its port, just like the Hub it also amplifies them, but it does not send them out from all remaining ports as Hub does. It converts the signals in frames and reads the source and destination addresses from frames. Based on destination address, it sends a frame only from the ports which are associated with the destination address of the frame.

What is the IETF?

The IETF stands for Internet Engineering Task Force. It is an organization that defines protocols which drive the Internet. The official website of IETF is the

What is the Round Trip Time?

Round Trip Time is the duration of time which a signal takes to reach at destination and returns back to the sender with the acknowledgement.

What is the difference Static IP address and Dynamic IP address?

A Static IP address is assigned manually. Once assigned it does not change unless it is changed manually again.

A Dynamic IP address is assigned by a service usually DHCP. It can change any time.

What is the SNMP?

SNMP (Simple Network Management Protocol) is a network management protocol. It is used for collecting information about services and devices in network. Collected information further can be used for reporting and troubleshooting the network.

What is the VPN?

VPN is a technology that allows remote users to connect and access network resources securely over the Internet. VPN stands for Virtual Private Network.

What are the difference between Firewall and Antivirus?

A Firewall filters the incoming network traffic. It is used to secure system from unauthorized access.

An Antivirus scans the stored data and installed applications. It is used to secure system from malware, virus, spyware, adware etc.

What is the Encryption?

Encryption is the process of converting data in secure form. Once Encrypted, it can’t be read by other devices except the intended receiver.

What is the Decryption?

Decryption is the process of converting encrypted data back in its original state. In this process first, keys are obtained from the device that encrypted data. Later, these keys are used to decrypt the data. Keys contain the information about how data is encrypted.

What is the purpose of a loopback address?

A loopback address is a special address in IP network. It is used for troubleshooting. For example, by sending ping packet on this address we can confirm whether the IP protocol is functional or not. Packets sent on this address are returned back to sender by IP protocol. Therefore, if we get the reply of ping packets then IP protocol is working fine otherwise there is some issue in configuration.

What IP address is used for loopback address?

In IPv4, entire IP range is reserved for loopback addresses. We can use any address from range to However, mostly is used for this purpose. In IPv6, only a single address is reserved for loopback testing and that is ::1.

What is the hybrid topology?

A topology which contains more than one topology is considered as a hybrid topology. A star-bus topology which contains both start topology and bus topology is the perfect example of the hybrid topology.

What are the main advantages of wireless network?

Scalability, mobility and flexibility are the main advantage of wireless network. In addition of these, wireless network is the cheapest network.

What are the main disadvantages of wireless network?

Main disadvantages of wireless network are speed and security. Signal interference, blockage, and interception not only make it slow but also make it less secure in comparison of wired network.

Which is the most popular international cable standard?


What is the attenuation?

The attenuation defines the progressive weakening of a signal as it travels over a cable or other medium. The longer the distance a signal travels, the weaker the signal gets.

Which cable is used to connect a workstation with backbone cable in bus topology?

In bus topology, Thinnet (RG58) cable is used to connect workstation with backbone cable.

What is the thickness of the Thinnet cable?

The thickness of the Thinnet cable is 0.25 inch.

What is the thickness of the Thicknet cable?

The thickness of the Thinnet cable is 0.5 inch.

That’s all for this part. In next part, we will take more networking interview questions with answers. If you have any suggestion, comment or feedback about this article, please mail me. If you like this collection, please do not forget to share it from your favorite social platform.

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