Computer Networks
50 articles in this topic
Computer Networks Interview Questions: Trace OSI, TCP/IP and Routing Step by Step
Follow one synthetic web request across DNS, ARP, TCP, NAT and longest-prefix routing, then turn each step into a strong interview answer.
Updated 18 Oct 20266 min readComputer Networks
Basics of Cyber Security: CIA Triad, Risks and a Worked Defence
Learn a consistent security vocabulary, connect common attack paths to suitable controls, and calculate how two defensive layers reduce account takeovers.
Updated 14 Oct 20266 min readComputer Networks
Cyber Threats and Attacks Explained: Types, Worked DDoS Example and Exam Traps
Learn to separate threats, vulnerabilities, vectors and attacks, then apply the distinctions to a calculated DDoS scenario and exam-style questions.
Updated 10 Oct 20266 min readComputer Networks
Computer Networks Hardware Basics: Devices, Domains and Worked Examples
Learn what hubs, switches, routers, gateways and access points actually do, then count network domains and trace frames through a two-LAN topology.
Updated 6 Oct 20266 min readComputer Networks
Data Link Layer Framing Explained: Byte Stuffing, Bit Stuffing and a Cross-Concept Numerical
Frame one four-byte payload in two ways, decode it, and then reuse the verified frame sizes in link-load and Stop-and-Wait calculations.
Updated 1 Oct 20266 min read58 viewsComputer Networks
Byte Stuffing in Computer Networks: Worked Framing Example and Exam Traps
Learn a precise byte-stuffing convention, trace a payload containing both FLAG and ESC, reverse it safely, and calculate frame overhead and transmission time.
Updated 26 Sep 20266 min readComputer Networks
Go-Back-N Protocol Explained: Sliding Windows, Worked Numericals and Exam Traps
Trace Go-Back-N through a lost frame, calculate its legal window and link utilisation, and avoid the ACK and wrap-around traps that spoil numericals.
Updated 24 Sep 20266 min readComputer Networks
Network Protection Explained: Firewalls, Segmentation and a Worked ACL Example
Learn a reusable trust-boundary model for network protection, then trace allowed and blocked traffic through a five-zone web service and its ordered firewall rules.
Updated 23 Sep 20265 min readComputer Networks
Data Link Layer Delay Analysis: Formulas, Worked Examples and Exam Question Patterns
Learn to separate transmission and propagation delay, calculate a complete stop-and-wait cycle, and choose the minimum sliding-window size without unit traps.
Updated 22 Sep 20265 min readComputer Networks
Application and Data Security: Controls, Worked Examples and Exam Traps
Follow one refund request through transport, identity, policy, validation, database, and audit controls. Then work through toy RSA arithmetic and key exam traps.
Updated 20 Sep 20265 min readComputer Networks
Cloud Storage and Databases Explained: Models, Replication and Worked Examples
Understand when to use object, block or file storage and when a database fits better. Follow two reproducible examples for IoT capacity and replica quorums.
Updated 19 Sep 20266 min readComputer Networks
Selective Repeat ARQ: Window Rules, Worked Example and Exam Question Patterns
Build a reliable Selective Repeat trace from sender and receiver state, then test the window rule and utilisation formula with worked numbers.
Updated 18 Sep 20265 min readComputer Networks