ICS/SCADA Cybersecurity — Question 4

When monitoring a network, you receive an ICMP type 8 packet. What does this represent?

Answer options

• A. Echo request
• B. Echo start
• C. Echo recall
• D. Echo reply

Correct answer: A

Explanation

The correct answer is A, as an ICMP type 8 packet is specifically defined as an Echo request, which is used to test the reachability of a host on a network. Options B and C do not correspond to any standard ICMP message types, while option D refers to an Echo reply, which is an ICMP type 0 packet, not type 8.