, Ethernet 4 . :
802.3/LLC ( 802.3/802.2 Novell 802.2)
Raw 802.3 ( Novell 802.3)
Ethernet DIX ( Ethernet II)
Ethernet SNAP.
802.3/LLC | |||||||||
1(2) | 46-1497(1496) | ||||||||
DA | SA | L | DSAP | SSAP | Control | Data | FCS | ||
LLC | |||||||||
Raw 802.3 / Novell 802.3 | |||||||||
46-1500 | |||||||||
DA | SA | L | Data | FCS | |||||
Ethernet DIX (II) | |||||||||
46-1500 | |||||||||
DA | SA | T | Data | FCS | |||||
Ethernet SNAP | |||||||||
46-1492 | |||||||||
DA | SA | L | DSAP | SSAP | Control | OUI | T | Data | FCS |
AA | AA | ||||||||
LLC | SNAP |
802.3/LLC
- 10101010 5
- (Start of Frame Delimiter, SFD) 10101011.
- (Destination Address, DA). 6 . , . 0 (unicast), 1 (multicast). . 0FFFFFFFFFFFF (broadcast). . 0 IEEE, (Organizationally Unique Identifier, OUI). 3 . 3- . 16 .
- (Source Address, SA) 2-x 6- , . 0.
- (Length, L) 2- , .
- (Data) 0 1500 . 46 , 46 .
- (Padding) -, 46 , .
|
|
- (Frame Check Sequence, FCS) 4 , CRC-32. .
802.3 -, LLC . LLC 3 ( LLC1) 4 ( LLC2), 1497 1496 .
Raw802.3/Novell 802.3
802.3 LLC.
Ethernet DIX / Ethernet II
Raw 802.3, 2- (L) . , Type(T) EtherType, , DSAP SSAP LLC , . SAP Type . EtherType SAP.
Ethernet SNAP
802.3 Ethernet. SNAP (SubNetwork Access Protocol ) 802.3/LLC , OUI Type. Type Type Ethernet II ( ). OUI (Organizationally Unique Identifier) , Type. 802.3 IEEE, 000000.
SNAP , LLC, DSAP SSAP 0, SNAP, Control 003, .
Ethernet
EtherType , , 1500, Ethernet II L/T. LLC. LLC , IPX, 2- , , 255, 255. , DSAP SSAP , , 255 , Raw 802.3. DSAP SSAP. 0, Ethernet SNAP, 802.3/LLC.