Commonly asked Computer Networks Interview Questions Last Updated : 11 Oct, 2025 Comments Improve Suggest changes 62 Likes Like Report Computer Networks (CN) are the foundation of modern communication systems, enabling devices to exchange data efficiently and reliably. Knowledge of networking concepts is critical for software developers, system engineers, and network specialists, making it a frequent topic in technical interviews.Computer Networks cover data transmission, routing, switching, and layered communication protocols, which are essential for designing, troubleshooting, and optimizing networks.Topic-wise Interview Questions:Network FundamentalsData TransmissionRouting & SwitchingTransport & Application LayerRelevant ResourcesTo do well in interviews, you need to understand core concepts, OSI Layers, TCP/IP Model, Routing, Protocols and IP Addressing.1. Core Concepts: OSI Model, TCP/IP Model, Transmission Media, Physical Layer, Data Link Layer, Routing, Transport Layer, Congestion Control in TCP, Session Layer, Application Layer, TCP vs UDP Protocol2. Advanced Topics: Framing, Error Control, Flow Control, Classless Network Addressing, Subnetting, Variable Length Subnet Masking (VLSM), Supernetting, Generic Routing Encapsulation(GRE), Secure Socket Layer (SSL), Remote Procedure Call(RPC). Create Quiz Comment K kartik Follow 62 Improve K kartik Follow 62 Improve Article Tags : Computer Networks Interview Questions Interview-Questions Explore Computer Network BasicsBasics of Computer Networking4 min readTypes of Computer Networks6 min readIntroduction to Internet10 min readNetwork Devices3 min readWhat is OSI Model? - Layers of OSI Model11 min readTCP/IP Model6 min readDifference Between OSI Model and TCP/IP Model2 min readPhysical LayerPhysical Layer in OSI Model3 min readTypes of Network Topology9 min readTransmission Modes in Computer Networks (Simplex, Half-Duplex and Full-Duplex)3 min readTransmission Media in Computer Networks7 min readData Link LayerData Link Layer in OSI Model4 min readSwitching | Computer Networks2 min readVirtual LAN (VLAN)3 min readFraming in Data Link Layer3 min readError Control in Data Link Layer3 min readFlow Control4 min readPiggybacking in Computer Networks2 min readNetwork LayerNetwork Layer in OSI Model3 min readIntroduction of Classful IP Addressing7 min readClassless Addressing in IP Addressing7 min readWhat is an IP Address?11 min readIPv4 Datagram Header4 min readDifference Between IPv4 and IPv63 min readPublic and Private IP addresses4 min readIntroduction To Subnetting5 min readWhat is Routing?10 min readNetwork Layer Protocols9 min readTransport LayerTransport Layer in OSI Model4 min readTransport Layer Protocols9 min readTransmission Control Protocol - TCP4 min readUser Datagram Protocol - UDP3 min readSession Layer & Presentation LayerSession Layer in OSI model2 min readPresentation Layer in OSI model2 min readSecure Socket Layer (SSL)4 min readPoint-to-Point Tunneling Protocol - PPTP2 min readMultipurpose Internet Mail Extension (MIME) Protocol3 min readApplication LayerApplication Layer in OSI Model4 min readClient-Server Model3 min readWorld Wide Web (WWW)6 min readIntroduction to Electronic Mail4 min readWhat is a Content Distribution Network and how does it work?4 min readProtocols in Application Layer4 min readAdvanced TopicsWhat is Network Security?7 min readQuality of Service and Multimedia5 min readAuthentication in Computer Network3 min readEncryption, Its Algorithms And Its Future6 min readIntroduction of Firewall in Computer Network3 min readMAC Filtering in Computer Network3 min readWi-Fi Standards Explained2 min readWhat is Bluetooth?6 min readGenerations of wireless communication2 min readCloud Networking4 min readPracticeTop 50 Plus Networking Interview Questions and Answers15+ min readTop 50 TCP/IP Interview Questions and Answers 202515+ min readNetwork Fundamentals Interview Questions - Computer Networks15+ min readLast Minute Notes for Computer Networks14 min readComputer Network - Cheat Sheet15+ min read Like