In a layer 2 frame, where is the destination MAC address?

A. The destination MAC address is in the first 6 bytes after the preamble.
B. The destination MAC address is in the second 6 bytes after the preamble.
C. The destination MAC address is the payload data.
D. The destination MAC address is found in the preamble.

A. The 6-byte destination MAC address is after the preamble/SFD so that it can be read by the switch for forwarding.