Networking Interview Questions & Answers

Showing 10 of 66 questions | Page 6

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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51. Expand IDEA.

IDEA stands for International Data Encryption Algorithm.

52. What is wide-mouth frog?

Wide-mouth frog is the simplest known key distribution center (KDC) authentication protocol.

53. What is Mail Gateway?

It is a system that performs a protocol translation between different electronic mail delivery protocols.

54. What is IGP (Interior Gateway Protocol)?

It is any routing protocol used within an autonomous system.

55. What is EGP (Exterior Gateway Protocol)?

It is the protocol the routers in neighboring autonomous systems use to identify the set of networks that can be reached within or via each autonomous system.

56. What is autonomous system?

It is a collection of routers under the control of a single administrative authority and that uses a common Interior Gateway Protocol.

57. What is BGP (Border Gateway Protocol)?

It is a protocol used to advertise the set of networks that can be reached with in an autonomous system. BGP enables this information to be shared with the autonomous system. This is newer than EGP (Exterior Gateway Protocol).

58. What is Gateway-to-Gateway protocol?

It is a protocol formerly used to exchange routing information between Internet core routers.

59. What is NVT (Network Virtual Terminal)?

It is a set of rules defining a very simple virtual terminal interaction. The NVT is used in the start of a Telnet session.

60. What is a Multi-homed Host?

It is a host that has a multiple network interfaces and that requires multiple IP addresses is called as a Multi-homed Host.