Which term refers to spoofing a MAC address with the MAC address of a legitimate user on the network?

Which term refers to spoofing a MAC address with the MAC address of a legitimate user on the network?

• A. TMAC
• B. Switch Spoofing
• C. MAC duplicating
• D. double tagging

Answer: (C)

Impersonating another host on a local network by using its exact hardware address is a form of MAC address spoofing, specifically duplicating the MAC of a legitimate user. When a device presents the same MAC as someone else, the network must decide which device truly owns that address, which can lead to traffic being misrouted or security controls tied to that MAC being bypassed. This behavior is most accurately described as MAC duplicating (or MAC cloning) because you are creating a second device that shares the same MAC address as the legitimate user. The other terms don’t fit this exact scenario. TMAC isn’t a standard term for this action. Switch spoofing refers to tricks aimed at altering switch CAM tables or port behavior to sniff or redirect traffic, not simply impersonating another user by duplicating their MAC. Double tagging concerns VLAN hopping via multiple 802.1Q tags rather than MAC impersonation.

Impersonating another host on a local network by using its exact hardware address is a form of MAC address spoofing, specifically duplicating the MAC of a legitimate user. When a device presents the same MAC as someone else, the network must decide which device truly owns that address, which can lead to traffic being misrouted or security controls tied to that MAC being bypassed. This behavior is most accurately described as MAC duplicating (or MAC cloning) because you are creating a second device that shares the same MAC address as the legitimate user.

The other terms don’t fit this exact scenario. TMAC isn’t a standard term for this action. Switch spoofing refers to tricks aimed at altering switch CAM tables or port behavior to sniff or redirect traffic, not simply impersonating another user by duplicating their MAC. Double tagging concerns VLAN hopping via multiple 802.1Q tags rather than MAC impersonation.