687983_a1d9b_aliev_t_i_seti_evm_i_telekommunikacii

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

5DF 7 4ACD E7 6C 6 B4C CE 4. 3B4 4C, F54 CE E7 6C, ECCDBA 67 4A FC C 7, D5 B 7 9 7CDBA 5 C98 F 5 DCD7 D5 5

B4C CE 4.

2 F 5!CBBC FC C 7 E7 6C 7 67 7 799 F5 6548! 67# "

C4, F 9 E7A , F 5 C ACD 67 97 974 C 5 56 F 5 97 #C9 BD797 4 7CD B55D CDBD " F34 A7 6 4 4, B55D CDBD B 65D5 E BC 5BD7489 C 4 95 D FC C 7 7CE " 67 F 5BD5 CD 79B4 D C 5 4-5DF 7 DC4. & 5EC D5 5, 67# "

C4, EC " 799 C 4A FC C 7, E5#CD F54C C C 5 79 A F 5 DCD7 67 7 4 E7 6C 7 BD795 D8 5 C98 F 5 DCD7 5# 7 C 5 67 7 799, CB4 D5D F 5 DCD 548 C, CE 97 C9 C, 97 5 A CCBA D5E F54C 7F B7995C F C CBD E 47E. 2 659C 95E C 48D7DC, 67 799, C 9 "BA F5B4C F5495 5 5 5 5D7 F5 6548! C4-5DF 7 DC48, CD ECD8 F54C C C 5 79 A F 5 DCD7 97 C9 C, B55D CDBD CC E76B E74895E 5 9 F 5 DCD7 B C BC 67 5, 5D5 6 FC C 7 C.

076 E 5 7 5E, 123 Token Ring C74 CDBA F34634525A62 F37E82A42 537 4 6, F )E BD54695 C9 A 67 5 9C 5 E5#9, F5B65486 67# " E5EC9D CEC9 BCD FC C 7)DBA D54865 5 9 67.

% FC C 7 C 9C 548 67 5, 97F EC 7F 5B5 97 DC9 C 7"47, 5 9 67 D 5F549 DC489 C 9CF 5 5 DC489 C 7 C #6 97 CEA, 9C5 5 E5C 4A F5495 5 5 5 5D7 67 7 F5 BCD C C E95#CBD 5 BD79! " DC C9 C 65D5 5 5 BCD8 9C 5BD F97 4A FC C 7 67 5. - C4 F5B4C FC C 7 67 7 E5 5DF 7 D8 123 9C65D5 5C 654 CBD 5 B E 545 5 5 7 C9 A 9C 5 5DF 7 4C995 5 67 7: 5D 50 5 100 B E 545 123 B5 B65 5BD8 4 D/B 5 400 B E 545 123 B5 B65 5BD8 16 D/B.

*4A C4 C9 A F 5 5 DC4895BD BCD Token Ring B5 B65 5BD8 16 D/B BF548 CDBA D76 97 7CE " F C 477F F F 4BC 4 3F 4 (Early Token Release – ETR), F 65D5 5E C4 FC C 7CD E7 6C B4C CE 4 B 7 F5B4C FC C 7 B 5C 5 67 7. 0767A 5 E5#95BD8 5 B45 4C97 DCE, D5 BCD8 Token Ring B5BD5 D 97 5 7 9C 7 B E EC#65EF8 DC 9 B A C", 7 9C F C BD7 4ACD B5 5" C 9 " 67 C48, F 5 5 A " C C BC 65EF8 DC. 3 D5 6 C9 A FC C 7 B 9745 67 5D 47 CD D54865 5 4 #7" C 5 B5BC 7.

% 9 ! 74 7! 123 Token Ring 5 97 7 5 BD79! " 97 97 7CDBA 67 CBD C 43EC972$2 27CE2 4, 97 65D5 " 5 47 7 DBA 5F549 DC489 C 659D 5489 C 96! 6548!C:

221

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

•E32 2AA5C 6A53689 45 CB65E 6548!C B !C48 A 4C9 A B D 7! ", B A 799 B F65232C 73 237;

•63 436E7A42 A6E6 6 73 237 F5B4C 5 97 #C9 A F5DC E7 6C 7;

•63 436E7A42 47 A6 54#2 4D 7 36E F 5F C C4C99 5 BD5ADC48BD 7.

% 5 C 76D 95 5 E59 D5 7 BD 5A, 97 97 7CDBA 95 " 76D 9 " E59 D5 E95#CBD 7 13. 2 67 CBD C E59 D5 7 7 D5E7D CB6 E5#CD D8 97 97 C97 BD79! A, EC 7A, 97F EC, 97 548 " (3-7 CB.

3.4.4. "93 258 42 39

2 BCD Token Ring BF548 DBA 3 D F7 67 5:

•67 799 (B.3.35,7);

•E7 6C (B.3.35, );

•F5B4C 5 7DC4895BD8 7 C C9 A (B.3.35, ).

4 477A – 5B95 95" D F 67 7, B5 C #7 " B4C C F54A

(B.3.35,7):

•C1 – A7#789ABC 37 2845289 (1 7"D);

•43 – F37E82A42 6 5 F6 (1 7"D);

•49 – F37E82A42 7 36 (1 7"D);

•AC – 7 32 A7 A7#2A4! (2 4 6 7"D);

•A – 7 32 4 56#A4 7 (2 4 6 7"D);

•32 5 – F682 7AABD;

•9 – 6A53689A7! 7 (4 7"D7);

•91 – 6A 2E6C 37 2845289 (1 7"D);

•9 – 575 (6 56!A42) 7 37 (1 7"D).

3.35

4 3F – B4 #C 9 " 67, B5 C #7 " 3 5 95 7"D5 F54A

(B.3.35, ):

•C1 – A7#789ABC 37 2845289;

•43 – F37E82A42 6 5 F6;

•91 – 6A 2E6C 37 2845289.

2D5F 294EF5672DE6 49F 'F7C8 – B4 #C 9 " 67, 65D5 " F 9C5 5 E5BD BF548 CDBA 4A F C6 7 C9 A F 5!CBB7 FC C 7 4 5" E5EC9D CEC9, B5 C #7 " 2 5 95 7"D5 F54A:

• C1 – A7#789ABC 37 2845289;

222

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

, CB8 J K – B55D CDBD C995 1 0 4 232A 4789A6 E79 CBDC B65E 65 C; 0 1 – 5 9 C 9 4C C C 9 9 C 97 C9 A; 9 – 45 F36 2% 56#A6 6 7 37; 88 – 45 6 A73 %2AA6C 6 4 4.

#CE 2 F E2B72$2 34 4 (Intermediate Frame) F 9 E7CD 97 C9 A:

•1, CB4 799 " 67 A 4ACDBA F 5EC# D5 9 E 67 5E E95 567 5 5" FC C 7;

•0, CB4 67 A 4ACDBA F5B4C 9 E 4 C 9BD C99 E.

#CE 2 74 F772 2'C 3C (Error-detected) BD797 4 7CDBA 0 E5EC9D B5 79 A 67 7 4C-BD5 9 6C E5#CD D8 EC9C9 97 97 C9 C 1 4 E 45E, 5 97 # E 5 6 F F 5 5# C9 67 7 F5 BCD. %5B4C D5 5 67 CD 79B4 CDBA C 659D 54A 5 56 F5B4C 47 5 5BD #C9 A 47-BD5 9 67, 65D5 " D5E B4 7C F C F ECD F5 D5 9 F5F D6 FC C 7 67 7.

%54A C1 91 5 AD B5BD7 BC D ) 67 5 BCD Token Ring.

3.4.4.2. F568 A3DA 24BC&F4

%54C )* - ) 495F7CF 2DE 2 (Access Control) 4 95" 8 D ECCD B4C BD 6D:

P P P T M R R R

, CB8 PPP – 45B F346345257; T – 45 73 237: 1 4A E7 6C 7 0 4A 67 7 799; M – 45 6A45637: 1, CB4 67 FC C 79 76D 9 E

BCDC E 7 7FDC 5E F 5 DCD7 E7 6C 67 7E 799. $D5 C74 CDBA F DCE 7F B F54C PPP 5 9A F 5 DCD7 5D 0 5 7 (7 – 97 B " F 5 DCD). - C4, F54 " E7 6C, ECCD F 7 5 FC C 7D8 67 D54865 D5E B4 7C, CB4 F 5 DCD 67 7 9C 9 #C F 5 DCD7 E7 6C 7. 2 F 5D 95E B4 7C E7 6C FC C 7)DBA B4C CE 4.

35 ECBD95 B D7E F 5 DCD7 111 BF548 DBA D C C 5 79 A RRR. - 4 BCD F 5!CBBC FC C 7 67 7 F5 6548! E5 D 7 C C 5 7D8 7489C" CC BF548 5 79 C BCD, F5ECBD 97 C9 C

223

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

F 5 DCD7 67 7, 5# 7 C 5 FC C 7, D C C 5 79 A RRR, CB4 D5D F 5 DCD C DC6 C 5 97 C9 A F54A C C 5 79 A. %5B4C D5 5, 65 7 FC C 7 " C4, F54 C 9 "BA 67 799, 5 E CD 95 " E7 6C, 59 BD797 4 7CD C 5 F 5 DCD PPP 7 9 E 97 C9 F54A C C 5 79 A RRR C 9 C 5BA 67 7. 076 E 5 7 5E, E7 6C CD FC C 79 4, BD795 CE F54C C C 5 79 A 97 B " F 5 DCD.

7BF548 5 79 C D7 E59 D5 7 , F5 54ACD A D8 B D 7!, 65 7 67 4 E7 6C 5 5 )4 123 F5 6548! 9C 97 )4 7 CB7D7.

% 9765E D5 5 A 4ACDBA F54 C9 C 76D 9 E E59 D5 5E 67 7 B D5E E59 D5 7 ,=1.

3.4.4.3. F568 A3DA 6254

&7 799 BCD Token Ring E5#CD B5 C #7D8 F54C 799:

• 4A 63 7 4 8! F37E82A4! 86 4#2 4 689 6 (799 C 5 9A

MAC), 65D5 5" 5 EC9 7 DBA 7 7FDC 4A F549C9 A 96! " 659D 54A F 7 4C9 A 7 5D5" 45 CB65 5 6548!7; D76 C 67

977 DBA 7 37 4 F37E82A4! 6 5 F6 32 2 4 ,A-!24 2;

•F689 6E75289 42 7AAB2 (799 C 5 9A LLC – LLC-!24).

(5F C C4C99 BD79 7 D5E IEEE 802.5) F 7 4A 67 5 5 9A MAC 59 F 97 4C# D.

3 CBD CD 25 D F5 (3-67 5, 65D5 C E5#95 7 C4 D8 97 B4C C FF:

•67 9 ! 74 7! BD79! (5 D F5);

•67 F 7 4C9 A B C 5" (5 D F5);

•67 B55 C9 " 5 5 67 (3 D F7);

•67 F 7 4C9 A BD79! AE (12 D F5). % EC (3-67 5:

0000 – 5 4 /6 2 # 24 5 2 – FC C 7CDBA 7 5 C" BD79! C",

FC C F B5C 9ACE5" 6 45 CB65E 6548!, D5 C D8BA, D5 CC 7 CB A 4ACDBA 9 67489 E;

7 95BD CB6 E F 5 7EE7E 5BD7D5 95 5F C C4 D8 C4, 65D5 " FC C 7CD D5 B55 C9 C;

224

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

0011 – 5/ 2 5 2 !5 2 – CB4 7F7B95" E59 D5 5 97 # 7CD, D5 76D 9 " E59 D5 FC CBD74 96! 59 5 7D8, 59 F BD F7CD 6 FC C 7 C 67 5 B D C 5 79 CE E7 6C 7; 7F7B9 C E59 D5 D5E B4 7C 97 97 D F 5!CBB 7 E5 C"BD A B 5E, D5 97 97 D8 95 " 76D 9 " E59 D5;

0100 – 2 2 ) 2# 26 32" # (+ !2) – FC C 7CDBA F5B4C 9 ! 74 7! 45 CB65 5 6548!7, F5B4C BD795 6 95 5 5 76D 95 5 E59 D5 7;

0101 – 26 + 5 (* 5) 2! 2 – FC C 7CDBA 76D 9 E E59 D5 5E 5BD7D5 95 7BD5 4A C 5E4C9 A 13 5 D5E, D5 76D 9 " E59 D5 96! 59 CD;

0110 – 26 + 5 32*2 (535) 2 – FC C 7CDBA 7F7B9 E E59 D5 7E.

3.4.4.4. 25AB6

2 BCD Token Ring E5 D BF548 5 7D8BA 7 CB7 4 95" 2 4 6 7"D. /5 E7D 7 CB5 BCD Token Ring B5 F7 7CD B 5 E7D5E 7 CB5 BCD

Ethernet.

%C " D (I/G – Individual/Group) 7 32 7 A7 A7#2A4! (AC)

!E8!25 ! F 9765E 9 74895 5 4 FF5 5 5 7 CB7. %C " D

7 32 7 4 56#A4 7 (A) BC 7 7 C9 0.

2D5 5" D 5F C C4ACD D F 7 CB7: 9 C B7489 " 4 4567489 " (U/L – Universal/Local). +BD7489 C D 5F C C4A D CB6 " 7 CB47.

3.4.4.5. *6339A

32 5 – 25F 477A E5#CD B5 C #7D8 F548 5 7DC48B6 C 799 C, F54 C99 C 4 F C 97 97 C99 C 4A F 5D56545 BCDC 5 5 5 9A, D76 676 IPX, IP, 4 B5 C #7D8 5 9 D F5 67 5 5 9A MAC. 3FC! 74895 5 5 79 C9 A 97 4 9 F54A 799 9CD, 5DA F 76D CB6 595 5 9 67CD - 7 5 79 C9 " 97 5F BD E5C CEA C #79 A E7 6C 7 (10 EB) 5 95" BD79! C". ,7 D5 CEA BCD8 B5 B65 5BD8 FC C 7 4 D/B E5#CD FC C 7D8:

4 ' 45/ *0,01 = 0,04 ' 45 = 40 000 45 = 5 7C5.

(9745 95, BCD8 B5 B65 5BD8 FC C 7 16 D/B E5#CD FC C 7D8:

16 ' 45/ *0,01 = 0,16 ' 45 = 160 000 45 = 20 7C5.

3 )D5E 7 C #C6 F FC C 7 C 799 97647 9 7B 5 5 97 7 545 56 659!C 6 67 7, F 9AD5 B D7D8, D5 E76B E74897A 4 97 F54A 799 9C 54#97 F C 7D8 4 !/2) 18 !/2) 4A 123 Token Ring B F 5F B695" BF5B5 95BD8 4 D/B 16 D/B B55D CDBD C995.

3.4.4.6. 43C54 36 B& 6

%54C 6A53689A6C B (9) B5 C # D 6 5756 4 B56#A6C 4 84#2 6C B (CRC – Cyclic Redundancy Checksum), B4C995" B F5E5 8 F54 95E5 D F7 CRC-32 4A BC F54C" 67 7, 97 97A B F54A F 7 4C9 A 67 5E (-&) 7679 7A F54CE 799. +BD7489 C F54A

225

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

B5 C #7D 799 C, EC9ACE C F 7BF 5BD 79C9 67 7 F5 6548!, 97F EC, D E59 D5 7 4 D C C 5 79 A F54C -*.

3.4.4.7. EC6C&B 6256

+ 95 7"D5 5C F54C 3& – 575 (6 56!A42) 7 37 (Frame Status – FS) – ECCD B4C " :

AC RR AC RR

, CB8: R - C C 9 " D (4 D7); A – 45 (F34 A7) 37 F6 A7E7A4! 7 32 7; – 45 (F34 A7) 6F436E7A4! F7 257.

076 676 659D 54897A B EE7 9C 5 7D 7CD F54C 9, D5 67# 5C 5 95 D95C F54C A 7"DC 7 4 5 795 4A 7 79D 5BD5 C 95BD FC C 7 7CE 799.

- C4-BD5 9 6 F 5!CBBC 5 E 5 79 A 67 7 4A FC C 7 BD797 4 7CD 0 D A . - C4-F )E9 6, 7 CB 65D5 5 5 B5 F74 B 7 CB5E 97 97 C9 A, 67 799 E 7 545 6C FC C 7 7CE5 5 67 7, F5B4C F54 C9 A 67 7 BD797 4 7CD D A 1.

3B4 F5B4C 65F 5 79 A 67 7 C 47-F )E9 67 9C 5 97 #C95 5 56 67 C, D5 D D76#C BD797 4 7CDBA 1.

076 E 5 7 5E, F 9765E BFC 95" FC C 7 67 7 A 4ACDBA 5 7 C9 C 67 7 6 BD5 9 6 B D7E: A=1 =1.

A=0 5 97 7CD, D5 BD79!-7 CB7D7 548 C 9CD BCD 4 BD79! A 47 BD 5A (64 C97).

A=1 =0 5 97 7CD, D5 F 5 5 47 5 67 97 F D 67 7 5D BD5 9 67 6 7 CB7D (F D5E D76#C CD BD795 4C9 1 D 5 97 #C9 A 5 6 659!C 5E 7 C4 DC4C).

A=1, =1 D 5 97 #C995" 5 6 88=1 5 97 7CD, D5 5 67 F 5 5 47 97 5 7D95E F D 67 7 5D 7 CB7D7 6 BD5 9 6, F5B4C D5 5 676 67 4 BFC 95 F 9AD 45E-7 CB7D5E.

3.4.5. &9A59C7A5 2 C 76 9A5254C DEF Token Ring

3 2 Token Ring:

• 65 5 5E42 6A 84 56E B C C FC C 7 799;

• 5 CBFC 7CDBA 737A5436E7AA62 E32 ! 6 5 F7 BCE F548 5 7DC4AE BCD;

•BCD8 Token Ring 5 5 5 96! 59 CD F34 689 6C 7 3 2, F45D8 5 7 6 100%, 5D4 C 5D Ethernet, 65D5 5" #C F 7 6C 30% 54CC B CBD C995 5 7BD7CD CEA 5BD F7, D5 6 7"9C 9C#C47DC4895 4A BCDC" C74895 5 CEC9;

•548 " 5F BD E " 7 EC FC C 7 7CE 799 5 95E 67 C (5 18 6 7"D), F5 B 7 9C9 B Ethernet, 5 CBFC 7CD 54CC $2 54EA62 A 46A436E7A42 254 F34 F232 7#2 689 4D 6 12 6E 7AABD;

226

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

•32789A7! 636 59 F232 7#4 799 BCD Token Ring B F 5F B695" BF5B5 95BD8 4 D/B E5#CD 567 7D8BA C, CE 10EC 7 D95" BCD Ethernet.

C54 2 ! Token Ring:

•54CC EB 6 7! 564 6 59 BCD Token Ring F5 B 7 9C9 B

Ethernet, D76 676:

3 5 5#C 7 7FDC - 7 54CC B45#95 5 F 5D56547 Token Ring;

35F549 DC489 C 7D 7D 97 F 5 CDC9 C MSAU;

•2A9 42 37 23B BCD Token Ring F5 B 7 9C9 B Ethernet;

•F 5F B69 C BF5B5 95BD BCDC" Token Ring 97BD5A CC CEA 97 DC4895 EC98 C F 5F B69 BF5B5 95BDC", 5BD 9 D 123

Ethernet (CBAD6 6 D/B C).

3.5. CDE FDDI

FDDI (Fiber Distributed Data Interface – 2 E292523277A C7EF &F D 4D F F5F7C8 477A) – 5 97 FC B565B65 5BD9 DC 9545 " 123 B F 5F B695" BF5B5 95BD8 100 D/B, C74 5 7997A 97 54565995-5FD CB65E 67 C4C.

3.5.1.B!C6 A 6 67C

3D79 7 D FDDI, 7 7 5D799 " (EC 679B6 E 97! 597489 E 9BD D D5E BD79 7 D5 (ANSI – American National Standards Institute),

C74 5 79 B E76B E7489 E B55D CDBD CE BD79 7 D IEEE 802.5 – Token Ring. .C 548 C 5D4 A 5D D5 5 BD79 7 D7 5F C C4A DBA 9C5 5 E5BD8 5 CBFC C9 A 589 2C 636 54 FC C 7 799 A7589 42 37 56!A4!.

FDDI-DC 9545 A F C BE7D 7CD BF548 5 79 C 5FD CB65 5 545697 67 CBD C B C FC C 7, D5 5 CBFC 7CD:

•EB 6 A7 2%A6 59;

•4 6 59 32 6A 4 37 44;

•EB 6 636 59 FC C 7 799 – 100 D/B;

•689 42 37 56!A4! EC# BD79! AE (4A E95 5E5 5 5 5 545697 – 2 6E; 4A 5 95E5 5 5 5 F BF548 5 79 47 C 9 5 5 – 5 40 6E; 4 97 BCD – 5 100 6E).

3.5.2. F53 45 372 93 27C 2 C A65C FDDI

16F686 4! BCD FDDI – E6CA62 689 6 (B.3.36), F CE F EC9A DBA 7 7 9597F 7 4C99 5FD5 5456599 67 C4A, D5 F5 54ACD BF548 5 7D8 F5495 F4C6B9 FC C 7 799 B 5C995" C6D 95" B65 5BD8 200 D/B, F D5E 67# " 679745 7 5D7CD B5 B65 5BD8 100 D/B.

&548!7 BCD FDDI 5 7 5 79 B5C 9C9 AE "D5 67-D5 67" EC# 7 5 E BD79! AE (13).

3D79!, 9CF5B C BD C995 64 C99 C 6548!5, 97 7 DBA

DE47 C8 C D 92 7A 2 35+BF7CF – DAS (Dual Attach Station).

227

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

3D79 7 D FDDI 4A 5BD #C9 A B565" 65BD BCD F C BE7D 7CD F EC9C9 C BCDC 7 7FDC 5 D F5:

•242* 5 !62 2 A, F5 64 7 CBA 6 9 D C99CE 9C 9CE 6548!7E BCD, D5 F5 54ACD C74 5 7D8 5 E5#95BD8 5 EC97 B5 B65 5BD8 200 D/B 4 #C 5 E5#95BD8 C C 5 79 A 67 C4A BCD (F F5 C# C9 5B95 95 5 67 C4A BF548 CDBA C C 9 " 67 C48); D 7 7FDC BF548 DBA B7E 6 D 9 7BDA BCD;

•242* 5 !62 2 F, F5 64 7 CBA D54865 6 9C 9CE 6548! BCD; D 7 7FDC 54CC F 5BD C C C C 9C EC D 5 E5#95BDC" 7 7FDC 5 647BB7 (.

& 5EC B5 BD C995 7 59C9D5 (65EF8 DC 5, DC E 9745 D. .) BCD FDDI E5 D BF548 5 7D8BA #3 5 ! "5 2, 65D5 C 5 CBFC 7 D:

•6A53689 7 7 5D5" BCD, 7 95BD 6 9C BF 7 95BDC" F 5 C9 C C659 7! 7 B CD 5 'C 9C9 A 5 95E ECBDC BC D5 C6 F5 64 C9 A;

•F326 37 6E7A42 4C6D CB6 B 9745 5FD CB6 C 975 5 5D F F EC9C9 67 C4C" 7 9 D F5 (5FD5 5456599 4C6D CB6).

% EC 659 7! BCD FDDI B BF548 5 79 CE B A 9 659!C9D 7D5 5 F C BD7 4C9 97 B.3.39.

3.39

2 B4 7C F5 C# C9 A 67 C4A F5 C# C99 " 7BD56 67 C4A B64 7CDBA 6548!7, 95 !C45BD95BD8 BCD F D5E 9C 97 7CDBA B4C BD C FC C 5 7 97 5 95 6548!5 ECBD5 , D.C. 7 7FDC 647BB7 ( 97 97 D 7 5D7D8 676 7 7FDC 647BB7 2 (B.3.40).

*4A ! 4 2 # FC C 7 7CE 799 FDDI F EC9ACDBA 65 42/52, BFC! 74895 7 7 5D799 " 4A D5 5 BD79 7 D7. 7BF548 5 79 C B E 545, F C BD7 4A 4 D7 (F54 7"D 4 7C 5), F5 54ACD 7FF7 7D9 E B C BD 7E FDDI 5FC 5 7D8 B F54 7"D7E 4 7"D7E, 7 9C B D7E, DCE B7E E BF5B5 BD A C4 C9 B65 5BD 5 EC97.

3.5.3. " 74 C972 72 93 27C 2 C FDDI

,7 5B95 BD79 7 D7 FDDI 4 AD ECD5 E7 6C 95 5 5BD F7, 5F B799 " F 5D5654C IEEE 802.5 Token Ring. +B95 9 C 5D4 A ECD5 7

229

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

5BD F7 FDDI 5D ECD5 7, BFC! ! 5 7995 5 F 5D56545E IEEE 802.5, 764 7 DBA B4C CE.

3.40

1.2 FDDI F EC9ACDBA 72 FDE9F7748 F F 4B4 4 3F 4, F 65D5 5E 95 " E7 6C FC C 7CDBA 5" BD79! B 7 #C F5B4C 5659 79 A FC C 7 67 7, 9C 5# 7A C 5 5 7 C9 A.

2.FDDI 9C F C BE7D 7CD 5 E5#95BD BD795 6 F 5 DCD5 F76CD5 C C 5 79 A, 65D5 C BF548 DBA IEEE 802.5 4A C4C9 A CB B5 BCD. 2ECBD5 D5 5 67# 7A 13 647BB ! CDBA 676 2 5 2#, 4A 65D5 5" CEA 5BD F7 6 BCD 9C 6 D 95, 5 2#, 4A 65D5 5" CEA 5BD F7 6 BCD #CBD65 5 79 C95, D.C. B CBD D 5 C98 #CBD6 C D C 5 79 A 6 9DC 747E CEC9 EC# FC C 7 7E. FDDI BF548 CD B45#9 " 74 5 DE 4A F C 5BD7 4C9 A 5BD F7 6 BCD D E E 647BB7E BD 5"BD.

&7 799 FDDI D76 #C, 676 67 IEEE 802.5, E5#CD 9CBD 9 5 E7! F5 F 7 4C9 45 CB6 E 6548!5E (799 C 5 9A MAC) 4 B5 C #7D8 F548 5 7DC48B6 C 799 C (799 C 5 9A LLC).

%54A 67 C FDDI EC D B4C C 97 C9 A.

– F4 54 – B4 # D 4A 97 74895" B 9 59 7! F CE7.

.CBE5D A 97 D5, D5 97 74895 4 97 D5 5 F54A 7 97 64 D (16

230