687983_a1d9b_aliev_t_i_seti_evm_i_telekommunikacii

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

Ethernet 5 B45 45 F EC9C9 C BFC! 74895 5 ECD5 7 45 CB65 5 65 5 79 A – 8 2/60, 5 CBFC C 5 54CC 6 " BFC6D B 9747, D5 F B65 5BD 33 D/B F5 54 45 45# D8BA F545B 16 6! D5" F7 67DC 5 3.

% 65 5 79 82/60 8 D 7EC9A DBA 6- D 5 9 E ! 7E. *4 DC4895BD8 5 95" D 5 95" ! – 40 9B. 34C 5 7DC4895, 5 9 7"D FC C 7CDBA 7 240 9B (6*40 9B), D5 B55D CDBD CD B65 5BD FC C 7 33,3 D/B. *4A FC C 7 799 BF548 CDBA 3 F7 UTP 67DC 5 3 (3*33,3 D/B = 100 D/B), C C 5 97 F7 7 BF548 CDBA 4A F 5B4 79 A 9CB C" B !C48 5 97 #C9 A 6544 ".

365 5BD8 EC9C9 A B 9747 97 67# 5" F7 C B5BD7 4ACD: 1/(40 9B) = 25 5, D5 F5 54ACD BF548 5 7D8 D F7 67DC 5 3.

3.3.1.3. 568D 6 F4BC54A3D 3474BA7 A3C39 E Fast Ethernet

1. %5 D5 DC4 Fast Ethernet C4ADBA 97 7 647BB7:

•!62 I – F5 C # 7CD BC 45 CB65 5 65 5 79 A (42/52, 82/60) E5#CD ECD8 F5 D BC D C D F5 CB65 5 5 9A: 100Base-0X, 100Base-04 100Base-FX;

•!62 II – F5 C # 7CD D54865 5 9 45 CB65 5 65 5 79 A (42/52 4 82/60) ECCD 4 5 BC F5 D 100Base-04, 4 5 F5 D 100Base-0X 100Base-FX, D76 676 F5B4C 9 C BF548 D 5 9 45 CB6 " 65 42/52.

2. 76B E74895C B45 F5 D5 DC4C" (%) 5 95E 5EC9C 6544 ":

•D54865 1 F5 D5 DC48 87 7 I - 7 548 5" 7 C #6 7BF 5BD 79C9 A B 9747 – 70 bt, 5 B45 4C995" 9C5 5 E5BD8 D 79B4 5 7D8 7 4 9 C B BDCE B 974 7! (B.3.27,7);

•2 F5 D5 DC4A 87 7 II, 95BA EC98 7 C #6 F FC C 7 C B 9745: 46 bt 4A F5 D5 100Base-0X 100Base-FX 33,5 bt 4A F5 D5 100Base-04 (B.3.27, ).

3.76B E74895C 7BBD5A9 C 5D F5 D5 DC4A 5 7 5 C" BD79! 7 B D 5D D F7 67 C4895" B BDCE B5BD7 4ACD 100-160 E.

4.76B E74895C 7BBD5A9 C EC# F5 D5 DC4AE 647BB7 II – 5 .

211

100VG-AnyLAN – DC 9545 A, 7 7 5D7997A E7E IBM

Hewlett-Packard 97 5B95 C DC 9545 100Base-VG (Voice Grade) 4A FC C 7 799 B5 B65 5BD8 100 D/B B BF548 5 79 CE F 5D56545

(67 5) 123 Ethernet 4 Token Ring (AnyLAN).

% C CBD 7A DC 9545 A 100Base-VG 7 7 7D 747B8 4A FC C 7 799 BCD Ethernet B5 B65 5BD8 100 D/B F5 9C 6 79 5 7995" D5" F7 C (UTP) 67DC 5 3, 565 BF548 CE5" 4A FC C 7 C 97 7CE5" F5 D5" F 9C 67 C4CE VG (Voice Grade). 2 100VG-AnyLAN, 676 100Base-VG, ECBD5 CSMA/CD

C74 5 79 ECD5 5BD F7 B F 5 DCD7E (Demand Priority) 95 7A B CE7 65 5 79 A 799 Quartet Coding (6 7 DCD95C 65 5 79 C), 47 5 7 A 65D5 5E 799 C FC C 7 DBA B5 B65 5BD8 25 D/B F5 4-E F7 7E UTP 5 95 CEC995, D5 B EEC 7CD 100 D/B.

CD5 Demand Priority 764 7CDBA B4C CE. 3D79! A, EC 7A 67 4A FC C 7, F5B 47CD 9 65 7BD5D9 " B 974 659!C9D 7D5, 7F 7 7A 9 6 " F 5 DCD 4A 5 9 799 B56 " 4A 799, BD DC489 6 CEC99 E 7 C #67E (97F EC, C 8 C5). 3B4 BCD8 B 5 5 97, 659!C9D 7D5 7 C 7CD FC C 7 67 7. %5B4C 7974 7 7 CB7 F54 7DC4A F 9AD5E 67 C 659!C9D 7D5 5DF 7 4ACD 67 BD79! 97 97 C9 A. $D5 5 97 7CD, D5 5D4 C 5D 659!C9D 7D5 7 Ethernet, 659!C9D 7D5 100VG-AnyLAN 7 5D7CD 97 2-E 5 9C OSI-E5 C4. 3B4 #C BCD8 79AD7, 659!C9D 7D5 BD7 D F54 C99 " 7F 5B 5 C C 8, 65D5 7A 5 7 7D 7CDBA F5 A 6C F5BD F4C9 A 7F 5B5 B CD5E F 5 DCD5: 7F 5B B 54CC B56 E F 5 DCD5E F549A DBA FC E.

'256 6 5 F7 6 B C C FC C 7 799 – 45 5 2 ).

76B E74895C #4 86 57A 4C E 254 – 1024.

212

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

76B E74897A F365!%2AA6 59 254 – 3 6E. 76B E74895C 37 56!A42 2% 57A 4! 4:

•100 E – 4A D5" F7 (UTP 67DC 5 3);

•180 E – 4A D5" F7 (UTP 67DC 5 5).

05F545 A BCD 100VG-AnyLAN 5 C98 F5 5#7 97 D5F545 BCDC" 10Base-0 Token Ring, 7 EC995 45 CB67A 5 7A 97 E7 6C 95C 6548!5 B55D CDBD C995, D5 #C CEA CB67A D5F545 A 5 A 7DC4895 " C 7", F D5E F2584 E25E82A4! 9C 5F B67 DBA.

3 A E 4CEC9D5E BCD 100VG-AnyLAN A 4ACDBA 65EE D " ! "5 2, F )E 5F B67CDBA 534 36EA! 67B67 5 79 A (B.3.29).

•LAN downlink port (F5 D B A "9 ") – F C 97 97 C9 4A F5 64 C9 A 659C 9 45 659!C9D 7D5 5 9 #9C 5 5 9A;

•LAN uplink port (F5 D B A "C") – F C 97 97 C9 4A F5 64 C9 A 659!C9D 7D5 7 C 9C 5 5 9A.

& 5EC 659!C9D 7D5 5 BCD 100VG-AnyLAN E5 D BF548 5 7D8BA:

•65EE D7D5;

•E7 D 7D5;

•BCDC C 7 7FDC.

3D79 7 D IEEE 802.12 F5 C # 7CD 3 D F7 67 5:

•IEEE 802.3 – Ethernet;

•IEEE 802.5 – Token Ring;

•IEEE 802.12 – 67 DCBD 5 79 A B5C 9C9 " 100VG-AnyLAN. 2 5 95E BC EC9DC BCD E5#CD F5 C # 7D8BA D54865 5 9 D F

67 5 FC C 7 799 – 4 5 Ethernet, 4 5 Token Ring.

+ 95" B5BD7 4A BD79 7 D7 IEEE 802.12 A 4ACDBA * ! 6 * 5 5 32* (Demand Priority Protocol – DPP).

DPP 97 97 7CD F5 A 56 5 7 5D6 7F 5B5 BD795 4C9 A B5C 9C9 " EC# 659C 9 E 47E. 3B4 659C 9 " C4 5D5

213

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

5DF 7 D8 67, 59 FC C 7CD 659!C9D 7D5 7F 5B 5 95 5 4 B565 5 F 5 DCD7. 3B4 4 4 659!C9D 7D5 9C C 5 FC C 7D8, 59 5DF 7 4ACD B 974 C# E7 5# 79 A (Idle – 9C 79AD). &5 9C 5" 659!C9D 7D5 5F 7 7CD BC B 5 4, D5E B4C 659!C9D 7D5 9 #9C 5 5 9A, F 9 E7A 5D 9 B 974 Idle. 3B4 C4 9C 76D C9 (65EF8 DC 64 C9), 59, CBDCBD C995, 9C C9C CD D76 C B 974. &59!C9D 7D5 ! 64 CB6 5F 7 7CD F5 D, 97 97A B F5 D7 B EC98 E 95EC 5E, AB9AA 5D5 95BD8 6 FC C 7 C. 3B4 5 95 CEC995 6 FC C 7 C 5D5 9CB654865 45, D5 659!C9D 7D5 7974 CD 7F 5B B CD5E:

•F 5 DCD7 7F 5B7;

•CB65 5 95EC 7 F5 D7, 6 65D5 5E F5 64 C9 FC C 7 "

C4.

2 B56 " F 5 DCD 97 97 7CDBA:

•F 45#C9 AE, 6 D 9 E 65 CEC9 C76!;

•F5 D 659!C9D 7D5 7.

% 67B67 95E B5C 9C9 659!C9D 7D5 5 5BD F 6 B C C FC C 7 799 C74 CDBA F 5D56545E DPP B4C E 5 7 5E:

1)7F 5B 5D 47, F5 64 )995 5 6 659!C9D 7D5 9 #9C 5 5 9A, D 79B4 CDBA 97 659!C9D 7D5 54CC B565 5 5 9A;

2)F 5F 5BC F5 D7 LAN downlink port 9 ! CDBA 5F 5B BC

F5 D5 659!C9D 7D5 7 9 #9C 5 5 9A, D54865 F5B4C D5 5 5 5 95 4ACDBA 5F 5B F5 D5 659!C9D 7D5 7 54CC B565 5 5 9A.

8 5 4 2 DC 9545 100VG-AnyLAN:

•5 E5#95BD8 BF548 5 79 A B CBD C" 67 C4895" B BDCE BCD 10Base-0;

•65 5 5E42 F65239 F364 E6 45289A6 54 4-7 6A 84 56E B C C FC C 7 799;

•5 E5#95BD8 F5BD 5C9 A F 5DA#C99 (5 4 6E) BCDC" C BF548 5 79 A 65EE D7D5 5.

3.3.3. Gigabit Ethernet

2 B565B65 5BD97A DC 9545 A Gigabit Ethernet 5 CBFC 7CD F 5F B69 BF5B5 95BD8 B BDCE DC4C65EE 9 67! 1 6 D/B 5F B797C65EC9 7! A 802.3z 802.3ab (97 UTP 5-" 67DC 5).

6 2AA6 54 DC 9545 Gigabit Ethernet:

•B5 79C9 BC 67 5, BF548 CE F C DC 9545 A Ethernet;

•F C BE5D C95 BF548 5 79 C C B " F 5D56547 5BD F7 6 B C C FC C 7 799:

4 F68 F82 A7! C B A F 5D56547 B ECD5 5E 5BD F7

CDMA/CD;

4 F68A6 F82 A7! – B 65EE D7D5 7E;

•F C BE5D C95 BF548 5 79 C B4C D F5 67 C4A:

42+&;

4D7A F7 7 67DC 5 5;

214

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

4 6576B 7489 " 67 C48.

%5 B 7 9C9 B DC 9545 AE Ethernet-10 Fast Ethernet EC9C9 A EC DBA 676 97 CB65E 5 9C, D76 97 5 9C (3.

*4A 5 CBFC C9 A 7ECD 7 BCD 5 200 E C74 5 79 B4C C C C9 A.

1. -C4 C9 E 9 E7489 " 7 EC 67 7 B 64 5 512 7"D, D5 B5BD7 4ACD 4096 D5 9DC 745 (bt). &7 5F549ACDBA 5 512 7"D F54CE 4D'C F7C8 (extension) 7 EC 5E 5D 448 5 0 7"D, 7F549C99 E 7F C C99 E B E 547E 65 7 82/102 (B.3.30).

5D 512 5 1518 7"D

3.30

2. *4A EC98 C9 A 97647 9 7B 5 5 659C 9 E 47E 7 C C95 FC C 7 7D8 9CB654865 67 5 F5 A, C 5B 5 5# C9 A B C FC C 7 4A BD79! ". 0765" C# E FC C 7 97 7CDBA «Burst Mode». % D5E BD79! A E5#CD FC C 7D8 F5 A 9CB654865 67 5 B 5 C" 4 95"

8192 7"D7 = 65536 D.

2 BD79 7 DC 802.3z 5F C C4C9 B4C C D F CB65" B C:

•5 95E5 5 " 2+&;

•E95 5E5 5 " 2+& 62,5/125;

•E95 5E5 5 " 2+& 50/125;

•5"95" 6576B 74 B 5495 E B5F 5D 4C9 CE 75 +E;

•E95 5E5 5 " 67 C48.

Gigabit Ethernet E5#CD D8 C74 5 797 97 D5" F7 C 67DC 5 5 (C65EC9 7! A IEEE 802.3ab) B BF548 5 79 CE 4- F7 F 5 5 9 65, F5 65D5 E 5 95 CEC995 FC C 7 DBA 799 C B5 B65 5BD8 1000 D/B. 34C 5 7DC4895, 67# 7A F7 7 54#97 5 CBFC D8 B65 5BD8 250 D/B. 7BF548 CE " ECD5 65 5 79 A – 1(-5 (5 5 9C" F5DC9! 747).

215

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

76B E74897A 7BD5D7 BFC6D 7 9CB C" F FC C 7 C D5 B E 545 65 7 PAM-5 B5BD7 4ACD 62,5 6!. 3 CD5E FCC 7 FC 5" 7 E59 6 F 5D5654 1000 Base-T D C CDBA F545B7 7BD5D 5 125 6!.

3. 3.4. 10Gigabit Ethernet

1A E F 5 5 DC4C", 64 7A Cisco System, Foun dry Networks

Nortel, 7 7 5D74 5 5 5 79 C 4A BCDC" Ethernet B F 5F B695" BF5B5 95BD8 10 6 D/B. 2 2002 5 D C # C97 BFC! 67! A IEEE 802.37C (10GEthernet), F C BE7D 7 7A BF548 5 79 C 545659955FD CB6 67 C4C". 2 2006 5 F 9AD BD79 7 D 10GBBase-T (IEEE 802.3an-2006), BF548 " 4A FC C 7 799 97 7BBD5A9 C 5 100 ECD 5 6 79 5 799 D F7 67DC 5 6 4 67.

0C 9545 A 10GEthernet F C 97 97 C97 4A FC C 7 799 97 97 DC489 C 7BBD5A9 A, D5 F5 54ACD 5FC 7D5 7E B A F C 47 7D8 B 5 E 64 C9D7E 95 C B4 F5 5 'C 9C9 4567489 BCDC". 0C 9545 A 10GEthernet C4 7CD F 5DA#C995BD8 BCDC" Ethernet 5 9CB65486 CBAD65 645ECD 5 ( 7 B E5BD 5D 4 9 549 5FD CB65 5 B 9747 D F7 BF548 CE5 5 67 C4A).

+B95 9 C 5B5 C995 BD 123 10GEthernet:

1)C74 5 79 D5486 5 F4C6B9 " C# E 97 5B95 C 65EE D7D5 5

(B.3.31);

2)BFC! ! 5 79 D FF BD79 7 D5 CB65 5 5 9A: 10GBase-X (BFC! 67! A 10GBase-LX4), 10GBase-R, 10GBase-W;

3)FC C 7 7A B C 7 – 54565995-5FD CB6 " 67 C48.

(F2 4 4 7 44 7 289ABD 4 52 DC 9545 Gigabit Ethernet

F C BD7 4C9 D7 4.3.6.

2 FFC 10GBase- X F C BE5D C97 D54865 5 97 B FC! 67! A: 10GBase-LX4, C L – 5 97 7CD, D5 BF548 CDBA D5 5" 7F7 59 F 5 7 95BD – 1310 9E.

2FF7 10GBase-R 10GBase-W C74 5 79 3 F5 BFC! 67!

7 B E5BD 5D 4 9 5 49:

1)10GBase-RS 1 0GBase-WS;

2)10GBase-RL 1 0GBase-WL;

3)10GBase-RE 1 0GBase-WE,

C S – 5 97 7CD, D5 BF5 48 CDBA FC " 7F7 59 F 5 7 955BD (850 9E); L – D5 5" 7F7 59 F 5 7 95BD (1310 9E); E – D CD " 7F7 59 F 5 7 95BD (1550 9E).

216

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

76B E74895C 7BBD5A9 C EC# FC C 7D 65E F CE9 65E 4A 5697 F 5 7 95BD E E5#CD 5BD 7D8 40 6E, D5 F5 54ACD BD 5 D8 DC D5 74895 F 5DA#C99 C D 79BF5 D9 C BCD.

3.3.5. 40Gigabit Ethernet C 100Gigabit Ethernet

2 9C 2010 5 7 IEEE F 9A4 95 " BD79 7 D IEEE 802.3ba C 5F549C9 A 6 BD79 7 D IEEE 802.3 Ethernet, 65D5 5E F C BE5D C9 C B65 5BD FC C 7 799 F5 BCD Ethernet – 40 6 D/B 100 6 D/B.

+B95 97A !C48 7 7 5D6 D5 5 BD79 7 D7 B5BD5A47 D5E, D5 7BF 5BD 79 D8 F 5D5654 802.3 97 B C B56 C B65 5BD FC C 7 799, F D5E 5 CBFC D8 E76B E7489 B5 ECBD E5BD8 9DC C"B5 B5 BD79 7 D5E 802.3 B !C48 B5 79C9 A F C 9 CBD ! " BCDC 9 7BD 6D. .C5 5 E5BD8 F5A 4C9 A D5 5 BD79 7 D7 5 B45 4C97 B) 5 7BD7 E B45E F 45#C9 " 548 E 5 'CE7E FC C 7 7CE 799. 2 B56 C D C 5 79 A 6 F 5F B695" BF5B5 95BD B C FC C 7 799 97 DC4895 F C 7 D B CBD C 5 E5#95BD Ethernet.

3D79 7 D 40/100 Gigabit Ethernet F5 C # 7CD F4C6B9 " C# E 5 C9D 5 79 97 7 4 9 C D F (B C) CB65 5 5 9A (PHY).

+B95 9 E !C4AE 7 7 5D6 BD79 7 D7 40/100 Gigabit Ethernet 4 B4C C:

•B5 79C9 C 5 E7D7 67 7 802.3, BF548 CE5 5 97 (3-5 9C;

•B5 79C9 C E 9 E74895 5 E76B E74895 5 7 EC 7 67 7 BD79 7 D5 802.3;

•5 CBFC C9 C 5BD5 C 95BD FC C 7 799 97 (3-5 9C – C 5AD95BD8 D5 5" 5 6 (BER) 9C 54#97 F C 7D8 10−12 ;

•5 CBFC C9 C F5 C #6 5D6 D5" D 79BF5 D95" BCD (OTN – The

Open Transport Network) – B56597 C#95" B C 4A FC C 7 7 95 5 95 5 D 7 67;

217

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

• 5 CBFC C9 C BFC! 67! " CB65 5 5 9A (PHY) 4A FC C 7 F5 5 95E5 5 5E 5FD CB65E 54569 (SMF), E95 5E5 5 5E 5FD CB65E 54569 (MMF), EC 9 E 67 C4AE 5 'C 9 DC4895" F47DC

(backplane).

+B95 9 E F548 5 7DC4AE BCDC" IEEE 802.3ba E5 D BD7D8 F 5 5 DC4 B BDCE 65EF59C9D5 4A BC C 5, BCDC" 79C9 A 799, BC C 9 C E, B565F 5 5 DC489 B4C9 ", !C9D 5 5 7 5D6 799, DC4C65EE 9 67! 599 65EF79 ", 7 D76#C B BDCE9 5FC 7D5 5. 7BF548 5 79 C B) 54CC E5 9 BC C 9 7 DC6D, !C9D 5 5 7 5D6 799, BCDC" F 5 7" C 5 659C 9 F548 5 7DC4C" C47CD, 5 E95 B4 7A, B C FC C 7 799 6 E ECBD5E. 3CD IEEE 802.3ba F5 54AD BD 79 D8 6 C ECBD7, 5 CBFC 7A 97 C#9, E7B D7 CE 7 DC6D B C FC C 7 799 4A 5 4CD 5 C9 A D C 5 79 " 6 F 5F B695" BF5B5 95BD.

*7489C" C FC BFC6D 7 D A B565B65 5BD9 DC 9545 " FC C 7 799 B A 7 D B 7 7 5D65" BCDC" Ethernet B5 B65 5BD8 FC C 7 1 0 D/B (Terabit Ethernet). % C F547 7CDBA, D5 DC 9545 A CD 7 7 5D797 6 2015 5, 4A C 5 F CDBA C D8 9CE745 F 5 4CE. 0C 9545 C", 65D5 7A E5#CD 5 CBFC D8 FC C 7 B) 5 7BD7 C 5 D 7 67, 5 E5#95, BD79CD DC 9545 A DWDM. *4A D5 5, 676 5DEC 7CD 5 9 B5 7DC4C" Ethernet 55 CD674, «9C5 5 E5 F C5 54CD8 E95#CBD 5 5 79 C9 ", 64 7A 1550-9795ECD 5 C 47 C E5 4A! B 7BD5D5" 15 66!. *4A C" BCD 9 #9 95 C B CE E5 4A!, 7 D76#C 95 5C 5FD5 545695, 95 C 47 C, 5 CE, BC 95 5C. .CAB95 D76#C, 6767A BCDC 7A 7 DC6D 7 F5D C CDBA 4A CC F5 C #6. 25 E5#95, 5FD CB6 C BCD C 5 54#9 D BF548 5 7D8 545695 B 76 E95" BC !C 95" 4 4C 5 9 C 545697 ECBD5 6 CE9 C. +FC 7D5 54#9 D 9C AD8 548 C F5495BD8 5FD CB6 BD 5"BD 5FD 6 B 5 5 95E F 5BD 79BD C (C 5456599)».

3.4. CDE Token Ring

3.4.1.B!C6 A 6 67C

Token Ring (73 23A62 689 6) – BCDC 7A DC 9545 A, 65D5 5" BD79! E5 D FC C 7 7D8 799 C D54865 D5 7, 65 7 59 47 C D 73 236, 9CF C 95 ! 6 4 E F5 6548!.

0C 9545 A Token Ring, F C 45#C997A E5" IBM 1985 5, 5F B797 BD79 7 DC IEEE 802.5. .7 97 C9 CE Token Ring 45 5 'C 9C9 C BCD8 BC D F5 $2, F B67CE E5" – 5D %& 5 548 $2.

+B95 9 C 52DA4#2 42 D737 5234 54 4 Token Ring:

•E76B E74895C B45 BD79! " 5 95E 6548!C – 256;

•E76B E74895C 7BBD5A9 C EC# BD79! AE 7 B D 5D D F7 FC C 7 C" B C B5BD7 4ACD:

218

123456 3. 78926ABC5 DCEF 6F 56ABC5 5 F

4100 ECD 5 – 4A D5" F7 (UTP 67DC 5 4);

4150 ECD 5 – 4A D5" F7 (IBM D F 1);

43000 ECD 5 – 4A 5FD5 54565995 5 E95 5E5 5 5 5 67 C4A;

•5 8 654C! E5 D D8 B5C 9C9 E5BD7E.

76B E74897A F 5DA#C995BD8 BCD 7 B D 5D 659 7!. 3 CBD D 7 7 79D7 DC 9545 Token Ring, 5 CBFC 7 C

B65 5BD8 FC C 7 799 4 16 D/B B55D CDBD C995. 35 CEC99 C 7 7FDC Token Ring, F5 C # 7 D 5 7 7 79D7.

3.4.2. F53 45 372 93 27C 2 C Token Ring

/ CB67A D5F545 A Token Ring " C 7" (B.3.32) C74 CDBA 7 B )D F5 64 C9 A BC 65EF8 DC 5 (7 5 BD79! ", 13) C C BCDC C 7 7FDC (3() 6 BD 5"BD E95#CBD C995 5 5BD F7 (MSAU – Multistation Access Unit), 65D5 5C 5B CBD 4ACD FC C 7 67 5 5D 47 6 4 F C BD7 4ACD B5 5" 659!C9D 7D5 Token Ring. MSAU ECCD 8 F5 D5 4A F5 64 C9 A 65EF8 DC 5 B F5E5 8 7 7F523ABD 7 282C 7 6 7"9 7 'CE7 4A F5 64 C9 A 6 E 659!C9D 7D5 7E. % 64 C9 65EF8 DC 7, F5 B5C 9)995 5 6 MSAU, F 5 B 5 D 7 D5E7D CB65C F5 64 C9 C 6 7 4 53789A6 67 C4. 2 B4 7C 5D67 7 4 5D64 C9 A BD79! MSAU 5 79 CD 5 5 F5 D7 D5" BD79!, 676 D5 F567 795 97 B.3.32 4A BD79! 135, F D5E B A 95BD8 6548!7 B5 79ACDBA.

15 CB67A D5F545 A 5 BC BF5B5 7 – " 6548!5". %76CD FC C 7CDBA 5D 47 6 4 F5 6548! 5 DC F5, F567 59 9C C 9CDBA C4, C 59 4 F5 5# C9.

.CB654865 MSAU E5 D 659BD 6D 95 5 'C 9AD8BA FF (647BDC, cluster), 9 D 65D5 5 5 7 59C9D B5C 9C9 6548!5, D5 F5 54ACD C4 D8 654 CBD 5 7 59C9D5, F5 64 C99 6 5 95E !C9D.

&7# " 7 7FDC B5C 9ACDBA B MSAU B F5E5 8 7 9597F 7 4C99 4 9 " B A . 076 E #C EA 7 9597F 7 4C99 E 4 9 AE B A , 5 A E E7 BD 7489 " 67 C48, E5 D D8 B A 79 MSAU 6548!5 (B.3.33), 5D4 C 5D 5 9597F 7 4C995 5 E7 BD 74895 5 67 C4A, 676 D5 F567 795 97 B.3.34.

219

3.4.3. " 74 C972 72 93 27C 2 C Token Ring

&7# " C4 123 F 9 E7CD 67 5D B5BC 9C 5 47, 5BBD797 4 7CD 5 9 B 9745 FC C 7CD 67 B4C CE 4.

%C C 7 7CE " 67 E5#CD B5 C #7D8 799 C (7 3 7AABD) 4 A 4AD8BA E7 6C 5E. 4 3F – BFC! 7489 " B4 #C 9 " 67, F C 5BD7 4A " 4, 65D5 " E 47 CCD, F 7 5 97 FC C 7 799.

&5 7 4 9C5 5 E5 FC C 7D8 67, C 5 7 7FDC 5# 7CDBA F5BD F4C9 A E7 6C 7, 7 7DCE F C5 7 CD C 5 67, B5 C #7 " 799 C, B 5 E 5 799 C F5 F 5D5654 B55D CDBD C 5 5 9A, FC C 7CD C 5 BCD8. &7 FC C 7CDBA F5 BCD 5D 47 6 4, F567 9C 5BD 9CD 7 CB7D7, 65D5 " BD795 D 9CE 5F C C4C99 C D 4A F5 D C # C9 A D5 5, D5 67 F54 C9 7 CB7D5E, CD 79B4 CD C 5 74CC BCD8. %76CD F 5 54#7CD #C9 C F5 BCD 5 5 7 C9 A C4-5DF 7 DC48, 65D5 5E F 5 C ACDBA F 7 4895BD8 FC C 7. 3B4 67 4 FC C 79 7 CB7D C 5 56, C4 E5#CD B 5 E 5 7D8 FC C 7D8 5 C C 95" 67 799 (CB4 D765 5" CBD8) 4 FC C 7D8 E7 6C B4C CE 4. &54 CBD 5 67 5 799, 65D5 5C E5#CD D8 FC C 795 5 9 E 45E, 5F C C4ACDBA E32 2A2 23%7A4! 73 237, 65D5 5C 5 95 B5BD7 4ACD 10 EB. %5 BDC C9 D5 5 CEC9 C4 54#C9 5D 7D8 E7 6C 5E4. 7 6C, 676 67 799, FC CEC 7CDBA F5 6548! 5D 47 6 4. 3B4 4C, F54 CE E7 6C, 9CD 799 (67 7) 4A FC C 7, D5 59

220