The MAC address substitution module then substitutes the source MAC address and the destination MAC address of the packet before it is forwarded into the interface port. The source MAC address is replaced by that of the output interface, and the destination MAC address is replaced by that of the immediate next hop (a router or the destination host).

Our analysis illustrates that MAC address randomization policies are neither universally implemented nor effective at eliminating privacy concerns.

MAC addresses are learned by the source MAC address on incoming frames to the switch, not the destination frames.

Mac address

Meaning

Noun