You have discovered that a hacker is trying to penetrate your network using MAC spoofing. Which description best describes MAC spoofing?

• A. Changing a hacker's network card to match a legitimate address being used on a network.
• B. Hiding a MAC address by randomizing it.
• C. Using MAC address filtering to permit access.
• D. Spoofing IP addresses at the network layer.

Answer: (A)