Question 1

What is the OSI model, and why do networking engineers still use it?

Accepted Answer

The OSI model is a conceptual 7-layer framework describing how data moves from raw bits up to the application layer. It's still used because it gives engineers a shared vocabulary to describe exactly where a network problem lives.

Question 2

What is CIDR notation, and how do you read something like 192.168.1.0/24?

Accepted Answer

CIDR notation expresses a subnet mask as a slash followed by the number of network bits. /24 means the first 24 bits are the network portion, leaving 8 bits (254 usable addresses) for hosts.

📡 Network EngineerInterview Questions

📡 Network Engineer
Interview Questions