Ethernet II vs 802.3 Frames

• Ethernet II Frame

  • Ethertype field (2 bytes)
  • Tells protocol of message in data field (e.g., IP)
  • No length field
  • No 802.2 LLC layer; Full data link layer protocol

Preamble

SFD

DA

SA

Ethertype

Preamble

SFD

DA

SA

Length

LLC frame

FCS

Data

FCS

Ethernet II Frame

802.3 Frame

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