📝 Three Types of addresses in Link Layer Addressing

Q1. Which layer provides node-to-node service in the Internet architecture?

💡 Difficulty: easy | ✅ Correct: B

Q2. Given that each intermediate node must both encapsulate and decapsulate, what can be inferred about frame format uniformity across a multi‑link path?

💡 Difficulty: medium | ✅ Correct: B

Q3. A path consists of three LANs and two WANs, each using a distinct data‑link protocol. How many encapsulation/decapsulation operations occur from source to destination?

💡 Difficulty: hard | ✅ Correct: B