, :
1. .
2. (.2) . 10- .
3. (.3) . .
4. , .
1. .., .. . , , : . / 3- . .: , 2006. 958 .
2. . . / 4- . .: , 2003. 992 .
3.
4. .. . . .: , 1995. 216 .
5. www.intuit.ru - .., .., : . . . .: (), 2005. 360 .
6. http://dmitrykarpov.nm.ru/networks/whatis.htm . . ?
7. http://www.compitech.ru/html.cgi/arhiv/03_02/stat_64.htm . ,
8.
3
Ethernet
, . , :
;
/ / ;
7-10 2 3 .
Ethernet/Fast Ethernet, () (, , ), . . , , ( 1), , ( 2) [1-4]. PDV PVV = [1,2,4]. , 2 [1], , ( bt - ) ( ):
|
|
1. ETHERNET (EN):
PDV = ( . . + L1* . ) +.. +( . . + L6* . ) <575 bt;
2. FAST ETHERNET (FEN):
PDV = *(L1+L2+L3)+ 2* . + 2* . hub < 512 bt;
3. EN/FEN:
PVV < 49 bt
CSMA/CD , / , . , , / [1-4]. [1, 6].
. , / , .. : / 8 , 20 [6]. , [8,9].
7-10 2 3 . , .4:
. 7-10 [1,2], .. . ( !) , , [3] .
.4.
7 | 7. | IEEE 802.xx | |
OSI | |||
LLC | |||
Ethernet | |||
: | |||
8 | 8. EN/FEN/GEN | EN/FEN/GEN | |
EN/FEN/GEN | |||
: | |||
9 | 9. | , | |
10 | 10. Ethernet | , | |
: | |||
, 1-2- . . , 1.0 247, .. 24 .
.9.
7-10, , , , Wi-Fi, ZigBee, Bluetooth .
|
|