You want to do an ICMP scan on a remote computer using hping2. What is the proper syntax?

In hping2, the -1 flag explicitly selects ICMP as the transport protocol, causing the tool to send ICMP echo request packets to the target. This is the correct and documented syntax for performing an ICMP scan and is analogous to using ping but with hping2's extended options.

The -i flag in hping2 controls the interval (time delay) between sent packets, not the protocol type, so this command would use the default TCP mode with a specified interval.

'-set-ICMP' is not a valid hping2 flag; hping2 uses short POSIX-style flags such as -1 (ICMP), -2 (UDP), and -S (TCP SYN).

Running hping2 without any protocol flag defaults to TCP mode, not ICMP, so no ICMP packets would be sent to the target.