Which statement below is accurate about the difference between Ethernet II and 802.3 frame
formats?

A.
802.3 uses a Length field, whereas Ethernet II uses a Type field.

B.
Ethernet II uses an 8-byte Preamble field, whereas 802.3 uses a 4-byte FCS field.

C.
802.3 uses a Type field, whereas Ethernet II uses a Length field.

D.
Ethernet II uses a 4-byte FCS field, whereas 802.3 uses an 8-byte Preamble field.

Explanation:

802.3 uses a Length field which indicates the number of data bytes that are in the data field.
Ethernet II uses a Type field in the same 2 bytes to identify the message protocol type. Both frame
formats use a 8-byte Preamble field at the start of the packet, and a 4- byte Frame Check Sequence
(FCS) field at the end of the packet, so those choices would be incorrect as to a difference in the
frame formats. Sources: Gigabit Ethernet by Jayant Kadambi, Ian Crayford, and Mohan Kalkunte
(Prentice Hall PTR, 1998) and CCNA Study Guide by Todd Lammle, Donald Porter, and James Chellis
(Sybex, 1999).