Ethernet
. , , , ( IPX IP).
Ethernet_802.3
Ethernet_II
Ethernet_802.2
Ethernet_SNAP
.
Ethernet_II IPX/SPX, TCP/IP, AppleTalk Phase I
Ethernet_802.2 IPX/SPX, FTAM
Ethernet_802.3 IPX/SPX
Ethernet_SNAP IPX/SPX, TCP/IP, AppleTalk Phase II
, Ethernet.
Ethernet_802.3
"" 802.3 ( ), NetWare Novell 3.12. IPX/SPX.
0 0 0 0 0 0 0 0 SFD (8 )
0 0 0 0 0 0 (6 )
0 0 0 0 0 0 (6 )
0 0 (2 )
FF FF 0 0 (46-1500 )
0 0 0 0 FCS(4 )
- 7 1010101010101010.... .
SFD - 1 10101011 .
- 2 , , .
IPX -.
, 46 , , 46+18 = 64 - .
, , .
(4 ) - : , , , , . Ethernet.
.
- 64 , - 1518 .
Ethernet_802.2
IEEE. 802.3 . NetWare 4.x.
IPX/SPX FTAM (File Transfer, Access and Management Protocol - , ).
0 0 0 0 0 0 0 0 SFD (8 )
0 0 0 0 0 0 (6 )
0 0 0 0 0 0 (6 )
0 0 (2 )
E0 DSAP (1 )
E0 SSAP (1 )
FF FF 0 0 0 (43-1497 )
0 0 0 0 FCS(4 )
DSAP (1 ) - () . , IPX/SPX NetWare - E0h.
|
|
SSAP (1 ) - .
(1 ) - IPX/SPX 03h, Ethernet_802.2. , .
- 64 , - 1518 .
Ethernet_SNAP
Sub-Network Access Protocol - . Ethernet_802.2
Ethernet_SNAP IPX/SPX, TCP/IP AppleTalk Phase II
0 0 0 0 0 0 0 0 SFD (8 )
0 0 0 0 0 0 (6 )
0 0 0 0 0 0 (6 )
0 0 (2 )
AA DSAP (1 )
AA SSAP (1 )
03 (1 )
00 00 00 (3 )
81 37 Ethernet (2 )
FF FF 0 0 0 (45-1500 )
0 0 0 0 FCS(4 )
DSAP (1 ), SSAP (1 ) - Ethernet_SNAP AAh.
(1 ) - 03h ( ).
(3 ) - .
IPX/SPX NetWare 00 00 00.
Ethernet (2 ) - . Ethernet NetWare Novell 81 37h.
:
IP (Internet Protocol) 08 00
ARP (Address Resolution Protocol) 08 06
Reverse ARP 80 35
AppleTalk 80 9B
AppleTalk ARP 80 F3
NetWare IPX/SPX 81 37
- 64 , - 1518 .
Ethernet_II
, . Ethernet_II IPX/SPX, TCP/IP AppleTalk Phase I
0 0 0 0 0 0 0 0 SFD (8 )
0 0 0 0 0 0 (6 )
0 0 0 0 0 0 (6 )
81 37 (2 )
FF FF 0 0 (46-1500 )
0 0 0 0 FCS(4 )
.
(2 ) , Ethernet_II. Ehernet_SNAP.
- 64 , - 1518 .