Ethernet (IEEE 802.3) Frame
(number of bytes in the message field)
Repeating pattern of 1’s and 0’s (1010101010)
Used by Virtual LANs; (if no vLAN, the field is omitted
If used, first 2 bytes is set to: 24,832 (8100H)
Used to exchange control info (e.g., type of network layer protocol used)
Used to hold sequence number, ACK/NAK, etc., (1 or 2 bytes)