______________________________3.3.  Ethernet (802.3)      205

. ,  IP   2048 (00800)   EtherType
  6   SAP.      EtherType -
   SAP,     Ethernet DIX 
   802.3,      802.3
   -      -
.     Ethernet DIX  Raw 802.3 ,   -
/       L/T.

 Ethernet SNAP

      ,  
     Ethernet,  802.2   
    Ethernet.     Ethernet
SNAP (SNAP  SubNetwork Access Protocol,    ). 
Ethernet SNAP (. . 3.6)     802.3/LLC 
     SNAP,   
: OUI  Type.  Type   2-       -
  Type  Ethernet II (       
 ).  OUI (Organizationally Unique Identifier)  -
 ,       Type.
   SNAP       -
 Ethernet II,       .
    802  IEEE,   OUI,
 000000.         -
  ,       -
,   ,       
(     OUI).

  SNAP   ,    LLC,  
 DSAP  SSAP   ,    SNAP.
 Control  LLC   003,   -
  .

 SNAP     LLC,   
    Ethernet,        802.
,  IP     LLC/SNAP 
      : FDDI, Token Ring, 100VG-
AnyLAN, Ethernet, Fast Ethernet, Gigabit Ethernet.

,    IP   Ethernet, Fast Ethernet  Gigabit
Ethernet  IP   Ethernet DIX.

    Ethernet

    Ethernet   -
.       EtherType  ,
     ,  1500, 
 Ethernet II          L/T.
        
 LLC.  LLC      ,   
    IPX,   2-    -
,    ,     255 . -