CISSP – Information Systems Security Architecture Professional (ISSAP) — Question 54

You work as a Network Administrator for McRoberts Inc. You are expanding your company's network. After you have implemented the network, you test the connectivity to a remote host by using the PING command. You get the ICMP echo reply message from the remote host. Which of the following layers of the OSI model are tested through this process? Each correct answer represents a complete solution. Choose all that apply.

Answer options

• A. Layer 3
• B. Layer 2
• C. Layer 4
• D. Layer 1

Correct answer: D, B, A

Explanation

The correct answer includes Layer 1, Layer 2, and Layer 3 because the PING command involves physical transmission (Layer 1), data link layer operations (Layer 2), and network layer addressing (Layer 3). Layer 4 is not applicable here as the PING command does not operate at the transport layer.