An attacker is attempting to Telnet a specific host secured behind a firewall rule that only allows inbound connections on TCP port 25. What aspect of RFC 791 (Internet Protocol) can the attacker exploit to perform this attack?
A.
Send a SYN/ACK to the host on TCP port 23 indicating a response to a SYN request from the host on the secure side of the firewall
B.
Send packets with a fragmentation offset of 20 and a TCP destination port 25. All subsequent packets will overwrite the IP header allowing a new IP header to be inserted
C.
Send two packets, the first packet with the DF bit clear and the MF bit set, and the second packet with a fragmentation offset of 1 and a destination port of TCP 23
D.
Set the TOS bits to 1111 1100 indicating a network control packet that should be forwarded to the host with high reliability (no discard )
E.
Send packets destined for TCP port 23 with the DF and MF bits clear and the fragment offset to 0 since many firewalls will pass IP fragments with a 0 offset