IP spoofing means to:

a. fool the target computer and any intervening firewall into believing that messages from the intruder's computer are actually coming from an authorized user inside the organization's network
b. clad or cover the internal processing (IP) lines with insulating material to shield the IP lines from excess heat or radiation
c. illegally tape or listen in on telephone conversations
d. detect and prevent denial-of-service attacks
e. act as an intermediate host computer between the Internet and the rest of the organization's networks

Answer: a. fool the target computer and any intervening firewall into believing that messages from the intruder's computer are actually coming from an authorized user inside the organization's network