Computer Networks · CS Fundamentals
Computer Networks Notes for Interviews
Computer Networks interview questions cluster around routing and path selection (especially BGP), address resolution and spoofing (ARP), subnetting arithmetic, and the practical behavior of protocols rather than pure OSI-layer trivia. Ediky's CN questions lean toward "diagnose what's happening on the wire" scenarios — traffic interception, rogue access points, routing ties — over textbook definitions.
What to actually study
- Routing & path selection — how routers actually break ties and pick a route (BGP path selection)
- ARP and address resolution — including how ARP spoofing enables traffic interception
- Subnetting — arithmetic under pressure, not just the CIDR notation rules
- Wireless/access-point behavior — how a new AP discovers its controller
- Multicast and one-to-many delivery patterns
Real questions from Ediky's CN bank
Actual question titles from Ediky's CS Fundamentals bank:
- "Traffic Between Two LAN Hosts Is Being Intercepted — How?"
- "The ARP Variant That Announces Itself Without Being Asked"
- "Two Routes, One Winner" (BGP path selection)
- "Why '126 Networks' Isn't the Same as '128'" (subnetting arithmetic)
Two ways to study on Ediky
Ediky's CN video course is the deepest of all seven subjects on this page — 106 lectures — alongside 84 scenario-driven questions in CS Fundamentals for active recall once you've been through the material.
Practice CN scenario questions
84 Computer Networks questions in Ediky's CS Fundamentals bank, plus a 106-lecture video course.
Open CS Fundamentals