(ISC)2
SSCP · Question #1000
Which of the following protocols does not operate at the data link layer (layer 2)?
The correct answer is D. ICMP. ICMP is the only of the mentioned protocols to operate at the network layer (layer 3). Other protocols operate at layer 2.
Submitted by diego_uy· Apr 18, 2026Network and Communications Security
Question
Which of the following protocols does not operate at the data link layer (layer 2)?
Options
- APPP
- BRARP
- CL2F
- DICMP
How the community answered
(29 responses)- A3% (1)
- B7% (2)
- D90% (26)
Explanation
ICMP is the only of the mentioned protocols to operate at the network layer (layer 3). Other protocols operate at layer 2.
Topics
#OSI Model#Network Protocols#Data Link Layer#ICMP
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