Chapter 1 (semester II) : Wired LANs

Q. How LLC sub-layer makes MAC sub-layer transparent?

Ans.  The LLC provides one single data link control protocol for all IEEE LANs. inn this way it differ from MAC sub-layer, which has different protocol for different LANs. a single LLC protocol can provide inter-connectivity between different LANs because it makes MAC sub-layer transparent.

Reference: B.A. Forouzan, chapter 13. Wired LANs: Ethernet, Data Communications and Networking.

Chapter 3. Transmission Media

Q. 1. List the type of Twisted Pair cable.
Ans.

• Unshielded Twisted Pair Cable
• Shilded Twisted Pair Cable 

Chapter 2. Network Models

Q. 1. Which device operate at Network Layer?
Ans. Router

Chapter 1. Introduction to Computer Networks

Q. 1. For n devices how many cables required for Mesh topology?
Ans. n(n-1) /2