687983_a1d9b_aliev_t_i_seti_evm_i_telekommunikacii
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076 E 5 7 5E, 5 97 BCD8 Ethernet 10Base-2: 4 E5#CD B5 C #7D8 9C 54CC 86 45;
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193
123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F
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•B45 659!C9D 7D5 5 EC# 4 E BD79! AE – 9C 54CC 4;
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•E76B E74895C 654 CBD 5 BD79! " BCD – 1024.
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100 E |
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3.18 |
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1024 |
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3.19 |
547 5 7 A EC98 C" BD5 E5BD 67 C4895" B BDCE 5 E5#95BD F5BD 5C9 A BCDC" B E76B E74895 5F BD E E 654 CBD 5E BD79! ", BCD 10Base-0 F54 4 5E 9 CC F545#C9 C 97 96C F 76D CB6 F5495BD8 DCB9 4 BCD, F5BD 5C99 C 97 6576B 74895E 67 C4C.
3.2.2.4. EFA D D 6 D 10Base-F
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194
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F 5F B695" BF5B5 95BD8 10 D/B. 2 67 CBD C B C FC C 7 799 5FD5 54565995" BCD Ethernet BF548 CDBA E95 5E5 5 " 545659955FD CB6 " 67 C48 (2+&).
3D 6D 97A 5 79 7! A BCD 79745 97 BD79 7 D 10Base-T: BCDC C 7 7FDC 7 5 BD79! " B5C 9A DBA B E95 5F5 D5 E F5 D5 DC4CE (659!C9D 7D5 5E) B F5E5 8 2+& 5 7 D CB6 D5F545 « C 7».
10Base-F 64 7 D BC A B4C C BD79 7 D. 1. 2 42 FOIRL (Fiber Optic Inter-Repeater Link):
•4 97 5FD5 54565995 5 67 C4A EC# F5 D5 DC4AE – 5 1 6E;
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2.2 42 10Base-FL (Fiber Link)– 4 C99 " 7 79D BD79 7 D7 FOIRL, 764 7 "BA C4 C9 E5 95BD FC C 7D 65, 7 B )D C 5 E76B E74895C 7BBD5A9 C EC# 45E F5 D5 DC4CE E5#CD
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2 5D4 C 5D 79CC 7BBE5D C99 BCDC", F5 D5 DC4, BF548 CE C 123 Ethernet 10Base-FB, F 5DB DBD 67 5 4A FC C 7 5 EC9 7 DBA BFC! 7489 E F5B4C 5 7DC4895BDAE B 9745, D5 F5 54ACD F5BD5A995 F5 C # 7D8 B 9 59 7! BCD. %5 D5E 123, F5BD 5C99 F5 BD79 7 D 10Base-FB, 97 7 D «B 9 599 " Ethernet». 547 5 7 A EC98 E 7 C #67E F FC C 7 C 799 5 95 5 BC EC9D7 5", 654 CBD 5 F5 D5 DC4C" C4 C95 5 5.
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BCDC" Ethernet 10Base-F. |
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17 84 |
7 3.2 |
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2 42 |
FOIRL |
10Base-FL |
10Base-FB |
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1000 E |
2000 E |
2000 E |
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2500 E |
2500 E |
2740 E |
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195
123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F
3.2.3. $272 78 39 67 DEF Ethernet
3D79 7 D 123 Ethernet 67974895 5 5 9A IEEE 802.3 5F B 7CD 5 E7D BF548 CE BCD 67 5 ECD5 5BD F7 6 B C C FC C 7 799 CSMA/CD.
2 F 5!CBBC 54 ! BCDC" Ethernet F5A 4 B8 4 D F7 67 5:
•Ethernet II 4 Ethernet DIX, F C 45#C99 " E7E DEC, Intel Xerox (DIX);
•Raw 802.3 4 802.3/Novell, F5A "BA C 48D7DC B 4 " 65EF79 Novell F5 B5 79 B 5C 5 BDC67 F 5D56545 BCDA Ethernet;
•802.3/LLC 4 802.3/802.2, F5A "BA 676 C 48D7D 7 C4C9 A 96! " 67974895 5 5 9A 97 F5 5 9 MAC LLC;
•Ethernet SNAP, F5A 4C9 C 65D5 5 5 45 795 9C5 5 E5BD8 F C C9 A F C 5 E7D5 67 5 6 5 CE BD79 7 D.
3.2.3.1. 625 Ethernet II (Ethernet DIX)
3D79 7 D Ethernet II 4 7 7 5D79 E7E DEC, Intel Xerox (DIX) B 9C 548 E EC9C9 AE F 9AD 1982 5.
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32 5 |
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Min = 64 7"D |
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Max = 1518 7"D |
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3.20 |
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–Universal/Local):
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IP (Internet Protocol) |
080016 |
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ARP (Adress Resolution Protocol) |
080616 |
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4 |
Reverse ARP |
803516 |
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Apple Talk |
809B16 |
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NetWare IPX/SPX |
813716 |
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076 E 5 7 5E, 4A4 789A7! 84A7 67 7 Ethernet (C F C7E 4) 64 7"D7, 7 7 4 789A7! – 1518 7"D5.
197
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3.2.3.2. 625 Raw 802.3 (IEEE 802.3/Novell)
2 5B95 BD79 7 D7 IEEE 802.3 4 F545#C9 67 Raw 802.3, F C 45#C99 " E5" Novell 97 7CE " D76#C 67 5E 802.3/Novell, 5 E7D 65D5 5 5 F567 79 97 B.3.22.
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7 |
1 |
6 |
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2 |
(0-1500) |
(46-0) |
4 7"D |
3.22
+B95 9 C 5D4 A D5 5 67 7 5D 67 7 Ethernet II 764 7 DBA B4C CE:
1)5B8E 7"D5 5 5 F54A F C7E 4 , 65D5 5C BD745 4 95" 7 7"D, C4C95 5 95 7"D5 5C F54C C8 – « .7 7489 " 5 79 DC48 67 7», 65D5 5C B5 C # D 65 10101011, 67 7 " 97 97 745 67 7;
2)ECBD5 F54A «0 F F 5D56547» F5A 45B8 7"D5 5C F54C 3 – «*4 97», 65D5 5C 5F C C4ACD 4 9 F54A 799 67 C; 5DB DBD C F54A «0 F F 5D56547» 5 B45 4C95 DCE, D5 67 802.3/Novell B55D CDBD CD D54865 F 5D5654 IPX/SPX 4 8 D5D F 5D5654 E5#CD 7 5D7D8 B 9 E;
3)F682 7AABD 6%25 6 23%759 65 0 6 1500 7C5, 95 CB4 4 97 F54A EC98 C 46 7"D, D5 BF548 CDBA 5F549 DC4895C F54C C – «.7 67», B F5E5 8 65D5 5 5 67 5F549ACDBA 5 E 9 E74895 5F BD E5 5 97 C9 A 46 7"D, CB4 F54C 799 EC98 C 46 7"D.
076 E 5 7 5E, 4 97 67 7 97 5 DBA 7F7 59C 5D 64 5 1518 7"D, 9C B D7A F C7E 4 F 9767 97 747 67 7. 27#95" 5B5 C995BD8
BD79 7 D7 IEEE 802.3 A 4ACDBA E6 6%A6 59 F232 7#4 F34 87 AB F36 2 6 7AABD 84A6C 2A22 46 7C56E, 47 5 7 A D5E, D5 67 7 D5E7D CB6 5F549ACDBA 5 9 #95 5 7 EC 7 F BD E B E 547E F54C «.7 67». 2 BD79 7 DC Ethernet II D76 C B D 7! 7BBE7D 7 DBA 676 5 5 9 C.
3.2.3.3. 625 802.3/LLC (625 802.3/802.2)
&7 802.3/LLC (802.3/802.2) B5 C # D DC #C F54A, D5 Raw 802.3 (B.3.23). +D4 C B5BD5 D 4 8 D5E, D5 F54C 799 BD7 4ACDBA F76CD F5 5 9A F 7 4C9 A 45 CB6 E B5C 9C9 CE LLC (C 79 9 47 5), B5 C #7 " 67 CBD C 7 545 67 D 5 95 7"D5 F54A:
•DSAP (Destination Service Access Point) – 56# 7 6 5 F7 8 7 F68 #7528! (1 7"D) 5F C C4ACD D F F 5D56547 C 9C 5 (BCDC 5 5) 5 9A F54 7DC4A 67 7;
•SSAP (Source Service Access Point) – 56# 7 6 5 F7 8 7 4 56#A4 7 (1 7"D) 5F C C4ACD D F F 5D56547 C 9C 5 (BCDC 5 5) 5 9A BD5 9 67 67 7;
•4 – F37E82A42 (1 4 2 7"D7) – B5 C # D 9 5 E7! 4A F 7 4C9 A 5 9 E D C BC B5, F C 5BD7 4ACE F5 5 9CE LLC; 97F EC, 97 C9 C 0316 B55D CDBD CD 9C9 EC 5 7995E 5 E7D
198
123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F
BD79 7 DC Ethernet 802.2, 67 7 CE, D5 F5 5 C98 LLC 5 CBFC 7CD 5 B4 # 79 C C BD795 4C9 A 45 CB65 5 B5C 9C9 A.
%54A DSAP, SSAP 4 5 7 D 7 686E6 F7 257 LLC.
7 |
1 |
6 |
6 |
2 |
(0-1500) |
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(46-0) |
4 |
7"D |
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C |
AC |
A |
3 |
2!5 LLC |
C |
9 |
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DSAP SSAP |
4 |
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*799 C |
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1 |
1 |
1/2 |
(0-1497/1496) |
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7"D |
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3.23 |
076 676 F54C «-F 7 4C9 C» F76CD7 LLC ECCD 4 9 1 ( C# EC LLC1) 4 2 7"D7 ( C# EC LLC2), D5 E76B E7489 " 7 EC F54A 799 EC98 7CDBA 5 1497 4 1496 7"D B55D CDBD C995.
3.2.3.4. 625 Ethernet SNAP
&7 Ethernet SNAP (SNAP – SubNetwork Access Protocol), F 5D5654 5BD F7 6 F5 BCDAE) F C 97 97 C9 4A BD 79C9 A 7 955 7 A 5 E7D7 67 5 65 5 67 D F5 F 5D56545, B55 C9 A 65D5 45#C9 F54C 799 67 5 Ethernet.
3D 6D 7 67 7 SNAP A 4ACDBA 7 D CE BD 6D 67 7 802.3/LLC 7 B CD C C9 A 5F549 DC4895 5 7 686E 7 F3656 687 SNAP, 65D5 " 97 5 DBA 7 7 545 65E F76CD7 LLC 64 7CD BC A 2 F54A:
• 45 !2 2 32" (3 7"D7) B5 C # D C9D 67D5 D5" 5 79 7!, 65D5 7A 659D 54 CD 65 F 5D56545, 67 7CE C F54C «D F» (65 F 5D56545 4A 123 659D 54 CD IEEE, 65D5 " ECCD C9D 67D5 5 79 7!, 7 9 " 000000; CB4 CE F5D C DBA C 65 F 5D56545, D5 5BD7D5 95 67 7D8 5" C9D 67D5 5 79 7!, 97 97 7 C" D 65, 9C EC9AA BD7 C 97 C9 A 65 5);
•* (2 7"D7) – B5BD5 D 2- 7"D B55D CDBD CD F54 «0 F» 67 7 Ethernet II, D5 CBD8 9CE BF548 DBA DC #C 97 C9 A 65 5 F 5D56545 54CC B565 5 252E6 6 5 9A.
% D5E 3 F54A 7 545 67 F76CD7 LLC 67 C Ethernet SNAP EC D F549C 6596 CD9 C 97 C9 A:
•DSAP (1 7"D) BC 7 B5 C # D AA16 67 7CD 97 D5, D5 67 ECCD 5 E7D D F7 Ethernet SNAP;
•SSAP (1 7"D) BC 7 B5 C # D AA16 67 7CD 97 D5, D5 67 ECCD 5 E7D D F7 Ethernet SNAP;
•* 2 65 5 (1 7"D) B5 C # D B45 0316.
3.2.3.5. 745DC 4F5A2A A3D CDF6 6256
% 76D CB6 BC BCDC C 7 7FDC Ethernet E5 D 7 5D7D8 B5 BCE CD 8EA D F7E 67 5, 7 D5E7D CB6 7BF5 97 7A .
199
123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F
.7 B.3.24 F C C97 B CE7 74 5 DE7 5F C C4C9 A D F7 67 7 123 Ethernet. %5B65486 4A 65 5 79 A D F7 F 5D56547 7"D5 5E F54C «0 F/*4 97» 67 7 DBA 97 C9 A, F C 7 C 97 C9 C E76B E74895" 4 9 F54A 799, 7 95C 1500 4 CBD97 !7DC 95" B BDCEC B B4C9 A 05DC16, 67 Ethernet II 4C 65 5D4 D8 5D D F5 67 5 F5 97 C9 D5 5 F54A. ,7DCE F 5 C ACDBA 974 C 4 5DB DBD C F54C" LLC, 65D5 C E5 D 5DB DBD 5 7D8 D54865 D5E B4 7C, CB4 7 F54CE 4 9 B4C CD 7 545 56 F76CD7 IPX, 7 EC995 2-7"D5 5C F54C 7F549C995C C 9 !7E. ,7DCE F 5 C A DBA 97 C9 A F54C" DSAP SSAP: CB4 59 7 9 ((16, D5 D5 67 Ethernet SNAP, F 5D 95E B4 7C – 67 802.3/LLC.
%54C |
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D F7 4 |
9CD |
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4 9 548 C |
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05DC16 ? |
,7 |
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7 |
F54CE 4 9 |
9CD |
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B4C CD IPX- |
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7 545 56 ? |
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,7 |
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7 |
F54CE 4 9 |
9CD |
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B4C CD B45 |
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A(16 ? |
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7 |
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&7 |
&7 |
&7 |
&7 |
Ethernet II |
802.3/Novell |
Ethernet SNAP |
802.3/LLC |
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3.24 |
3.2.3.6. 54C4 4 CSMA/CD |
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% 5F B79 F 5D56547 CSMA/CD CEC99BC 9DC 74 5 95EC AD8 9C 7 B54 D9 C 9 !7 CEC9 (E6B 4 EB), 7 654 CBD C D76 97 7CE «D5 9DC 745».
#CE29A C7EF 945 – D5 9DC 74, B55D CDBD " FC C 7 C 5 95 5 D7, D5 CBD8 D5 CEA EC# F5A 4C9 CE F5B4C 5 7DC489 D. + 5 97 E C C bt – D5 " 9DC 74, D5 7 4 DC4895BD8 D5 5 5 9DC 747 CD 5F C C4AD8BA B4C E 5 7 5E: τbt = 1/ C , C ( – F 5F B697A BF5B5 95BD8 B C FC C 7 (B65 5BD8 FC C 7 799). % F 5F B695" BF5B5 95BD (=10 D/B 4 DC4895BD8 D5 5 5 9DC 747
τbt = 100 9B τbt = 10 9B F (=100 D/B.
200