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Computer Network Defence Ltd

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Link Layer Headers


For Link Layer Headers in pdf
Respect to "Jax" The Packet Queen for the information on this page
"See the packets,
Feel the packets,
Be the packets!"

Link Layer Headers

IEEE 802.2 / 802.3 Encapsulation (RFC 1042)

802.3 MAC

802.2 LLC

802.2 SNAP

 

 

dst addr

src addr

Length

DSAP AA

SSAP AA

Cntl 03

Org code 00

Type

data

CRC

6

6

2

1

1

1

3

2

38-1492

4

 

 

 

 

 

 

 

type 0800

IP datagram

 

 

 

 

 

 

 

 

2

38-1492

 

 

 

 

 

 

 

 

type 0806

ARP request / reply

PAD

 

 

 

 

 

 

 

 

 

2

28

10

 

 

 

 

 

 

 

 

 

type 8035

RARP request / reply

PAD

 

 

 

 

 

 

 

 

 

2

28

10

 

 

 

Ethernet Encapsulation (RFC 894)

 

46 – 1500 bytes

 

dst addr

src addr

type

data

CRC

6

6

2

46 – 1500

4

 

 

type 0800

IP datagram

 

 

 

2

46 - 1500

 

 

 

type 0806

ARP request / reply

PAD

 

 

 

 

2

28

18

 

 

 

 

type 8035

RARP request / reply

PAD

 

 

 

 

2

28

18

 

 
                           

 

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