Networking Interview Questions & Answers

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Networking technical interview questions and answers are essential for anyone preparing for IT support, system administration, or network engineering roles. In most companies, networking is the backbone of communication, security, and server operations, which is why recruiters evaluate candidates on core concepts like OSI Model, TCP/IP, protocols, IP addressing, routing, switching, and troubleshooting. Whether you are a fresher or an experienced candidate, mastering networking topics helps you perform confidently during technical rounds. These questions are commonly asked in companies like TCS, Wipro, Infosys, Accenture, Cognizant, and Capgemini during campus placements and lateral hiring. In this guide, you will learn frequently asked networking interview questions with answers, simple explanations, and practical examples. You can also download PDFs and practice mock interview sets to strengthen your preparation for both technical interviews and placement tests.

Showing 10 of 66 questions

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11. What is NETBIOS and NETBEUI?

NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications. NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets.

12. What is RAID?

A method for providing fault tolerance by using multiple hard disk drives.

13. What is passive topology?

When the computers on the network simply listen and receive the signal, they are referred to as passive because they dont amplify the signal in any way. Example for passive topology - linear bus.

14. What is Brouter?

Hybrid devices that combine the features of both bridges and routers.

15. What is cladding?

A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable.

16. What is point-to-point protocol

A communications protocol used to connect computers to remote networking services including Internet service providers.

17. How Gateway is different from Routers?

A gateway operates at the upper levels of the OSI model and translates information between two completely different network architectures or data formats

18. What is attenuation?

The degeneration of a signal over distance on a network cable is called attenuation.

19. What is MAC address?

The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.

20. Difference between bit rate and baud rate.

Bit rate is the number of bits transmitted during one second whereas baud rate refers to the number of signal units per second that are required to represent those bits.