Multiple choice

Which of the following is a wrong example of network layer?

  1. Internet Protocol (IP) - ARPANET

  2. X.25 Packet Level Protocol (PLP) - ISO

  3. Source Routing and Domain Naming - USE NET

  4. X.25 level 2-ISO
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

X.25 Level 2 (LAPB) operates at the data link layer, not the network layer. The network layer includes protocols like IP and X.25 PLP.

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