ICMP scanning is a category that primarily uses which protocol?

ICMP scanning is a category that primarily uses which protocol?

• A. UDP
• B. TCP
• C. ICMP
• D. SCTP

Answer: (C)

ICMP scanning relies on the ICMP protocol to probe targets. ICMP is the protocol designed for error reporting and diagnostics in IP networks. In ICMP-based reconnaissance, you send ICMP messages (typically echo requests, i.e., pings) and observe the replies to determine which hosts are alive and how devices along the path respond to ICMP traffic. Because the scanning technique is defined by using ICMP messages for probing, ICMP is the correct protocol for this category. Other options represent scanning methods that use UDP, TCP, or SCTP probes, which belong to their respective categories rather than ICMP scanning.

ICMP scanning relies on the ICMP protocol to probe targets. ICMP is the protocol designed for error reporting and diagnostics in IP networks. In ICMP-based reconnaissance, you send ICMP messages (typically echo requests, i.e., pings) and observe the replies to determine which hosts are alive and how devices along the path respond to ICMP traffic. Because the scanning technique is defined by using ICMP messages for probing, ICMP is the correct protocol for this category. Other options represent scanning methods that use UDP, TCP, or SCTP probes, which belong to their respective categories rather than ICMP scanning.