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

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)

MAC spoofing involves altering the hardware address that your network interface presents to the local network. The best description is changing a hacker’s network card to match a legitimate address being used on a network. By making frames appear as if they come from another device, the attacker can bypass simple MAC-based checks, blend in with trusted devices, or try to intercept traffic intended for the real device. This is fundamentally about impersonating another device at the data-link layer (the MAC address). Hiding a MAC address by randomizing it isn’t the same as spoofing a specific legitimate address, and MAC address filtering is a defensive control that aims to permit or deny access based on MAC, which the attacker would try to circumvent rather than describe the act of spoofing. Spoofing IP addresses is a different technique at the network layer, not the MAC layer.

MAC spoofing involves altering the hardware address that your network interface presents to the local network. The best description is changing a hacker’s network card to match a legitimate address being used on a network. By making frames appear as if they come from another device, the attacker can bypass simple MAC-based checks, blend in with trusted devices, or try to intercept traffic intended for the real device. This is fundamentally about impersonating another device at the data-link layer (the MAC address).

Hiding a MAC address by randomizing it isn’t the same as spoofing a specific legitimate address, and MAC address filtering is a defensive control that aims to permit or deny access based on MAC, which the attacker would try to circumvent rather than describe the act of spoofing. Spoofing IP addresses is a different technique at the network layer, not the MAC layer.