Tag: Question 1007

Systems Security Certified Practitioner – SSCP – Question1007

Which of the following protocols does not operate at the data link layer (layer 2)?

A. PPP
B. RARP
C. L2F
D. ICMP

Correct Answer: D

Explanation:

ICMP is the only of the mentioned protocols to operate at the network layer (layer 3). Other protocols operate at layer 2. Source: WALLHOFF, John, CBK#2 Telecommunications and Network Security (CISSP Study Guide), April 2002 (page 1).