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:




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IV. DP-Demaud Priority ( )




1. (). . : . ( , ). , .

2. , - -. .

3. , : (-).

 

.

IEEE Project 802 IEEE, 1980., (802).

: , (, ). 2 OSI . : : LLC(Logic Link Control) MAC(Media Access Control).

MAC . , , . , MAC. , , , ( , !).

( ) , , , , .

MAC, LLC.

LLC . LLC , , , . , top secret, , , 100%- .

LLC (Logical Link Control) . , MAC, . LLC .

LLC MAC. LLC :

♦ (, IP, NetBEUI IPX).

♦ -.

♦ ( ).

LLC , , , . MAC, MAC (, Ethernet), , MAC.

. LLC , :

♦ LLC1 .

♦ LLC2 .

♦ LLC3 , .

, .

, . . , , . , , LLC1 .

(UDP, User Datagram Protocol). , .

LLC2 , , , . . (, ), . , .

,

, , / , , . , , . LLC1 LLC2 LLC3.

, . , NetBIOS/NetBEUI ( Microsoft/ IBM) LLC2. , NetBIOS/NetBEUI , NetBIOS/NetBEUI , LLC1.

TCP/IP LLC1, LLC IP, ARP .

C IEEE 802.x 2.1
802.1 (internetworking)
802.2 LLC (Logical Link Control)
802.3 CSMA/CD (Ethernet)
802.4 Token Bus (Token Bus LAN)
802.5 Token Ring (Token Ring LAN)
802.6 MAN (Metropolitan Area Network)
802.7 , - (Broadband Technical Advisory Group)
802.8 - (Fiber Optic Advisory Group)
802.9 (Integrated Voice and Data Networks)
802.10 (Network Security)
802.1 1 (Wireless Networks)
802.12 (Demand Priority Access LAN)




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