The -1 flag in hping3 is used to send what type of packet?

The -1 flag in hping3 is used to send what type of packet?

• A. ICMP Echo Request
• B. TCP SYN packet
• C. UDP datagram
• D. RST

Answer: (A)

Using this tool, the -1 option switches the flow into ICMP mode, so the crafted packets are ICMP rather than TCP or UDP. In ICMP mode, the standard thing sent is an ICMP Echo Request, the same type of message that the ping utility uses to check if a host is reachable. When a target receives an Echo Request, it typically replies with an ICMP Echo Reply, enabling you to verify connectivity and measure latency. So, the -1 flag is used to send an ICMP Echo Request. The other options describe different protocols or purposes that aren’t produced in ICMP mode. A TCP SYN packet comes from TCP mode, a UDP datagram from UDP mode, and an RST is a TCP control flag used within TCP communications.

Using this tool, the -1 option switches the flow into ICMP mode, so the crafted packets are ICMP rather than TCP or UDP. In ICMP mode, the standard thing sent is an ICMP Echo Request, the same type of message that the ping utility uses to check if a host is reachable. When a target receives an Echo Request, it typically replies with an ICMP Echo Reply, enabling you to verify connectivity and measure latency. So, the -1 flag is used to send an ICMP Echo Request.

The other options describe different protocols or purposes that aren’t produced in ICMP mode. A TCP SYN packet comes from TCP mode, a UDP datagram from UDP mode, and an RST is a TCP control flag used within TCP communications.