How Is ICMP Used an Exfiltration Technique

Multiple Choice

How is ICMP used an exfiltration technique?

A) by flooding the destination host with unreachable packets
B) by sending large numbers of ICMP packets with a targeted hosts source IP address using an IP broadcast address
C) by encrypting the payload in an ICMP packet to carry out command and control tasks on a compromised host
D) by overwhelming a targeted host with ICMP echo-request packets