Computer Networks
30 articles in this topic
Ethernet in the Data Link Layer: Frame Format, CSMA/CD, and Worked GATE Examples
Build Ethernet from its frame fields upward, then solve collision-window, back-off, efficiency, and domain-counting problems with the reasoning shown.
Network Hardware Basics for GATE CS: Devices, OSI Layers, and Collision Domain Counting
Stop mixing up hubs, switches, and routers. Learn the device layers, domain-counting rules, transmission media, and a worked topology for GATE and interviews.
Data Communication in Computer Networks: Complete Guide with Worked Examples
Build the Data Communication basics that make Computer Networks numericals easier. Learn the core terms, choose the right formula, and solve four standard patterns step by step.
Flow Control in the Data Link Layer: Stop-and-Wait, Sliding Window, and Worked Examples
See Stop-and-Wait, sliding windows, Go-Back-N, and Selective Repeat as parts of one system. One link carries every calculation from efficiency to sequence bits.
Data Link Layer Error Control in Computer Networks: Concepts, CRC, Hamming and Worked Examples
Build error control from first principles, then work through parity, CRC, Hamming code and checksum using bits you can verify by hand.
Data Link Layer Access Control: Medium Access Protocols with Worked Examples
Understand where access control sits inside the MAC sublayer, compare random, controlled and channelized access, and solve the ALOHA and CSMA/CD calculations students commonly mix up.
Cyber and Info Security in Computer Networks: Complete Guide with Worked RSA and Diffie-Hellman Examples
Build the topic from security goals to firewalls, then hand-calculate RSA encryption, an RSA signature, and a Diffie-Hellman shared secret. Includes exam traps and an interview-ready TLS explanation.
Application Layer in Computer Networks: Protocols, Worked Examples, and How GATE Tests It
Build a clear application-layer model, work through DNS and HTTP timing problems, revise the major protocols, and avoid the traps that cost easy marks.
Express.js REST API Tutorial: Routing, Middleware, and Error Handling the Production Way
Build one small courses API and trace every request through parsing, routing, 404 handling, and a single error path.
OSI vs TCP/IP Model for GATE: Which Layer Does What, with PYQ Traps
Map every OSI and TCP/IP layer to its function, PDU, address and device. Then trace an HTTP request through encapsulation and fix the usual layer traps.
CSS Box Model, Positioning and z-index Explained with Worked Layout Examples
Calculate a CSS box's real width, choose the right position value, and trace z-index with exact numbers. The examples turn common layout bugs into rules.
TCP Congestion Control for GATE
Track cwnd at one fixed point in every round, apply the correct growth rule, and reset it on the stated loss signal. A worked ten-RTT table follows the sawtooth.