5-4-3-2-1 CSMA/CD Ethernet, . . ( ). , .
5 , 4 , 3 , 2 , .. , .
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19. FDDI . , Ethernet. , FDDI . ?
C FDDI , . Ethernet . FDDI, , , .
( ). ( ). , DAS (dual attachment station - DAS), . SAS (single attachment station - SAS) FDDI , .
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20. , ATM , Ethernet? ATM ?
- ATM Ethernet . ATM , QoS, , . , .., .
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21. . 3 . . 20 , 100.
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22. , : A-D, A-B, B-C, C-D, D-E, B-E, E-F, F-G. , , AD , .
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23. , : A-D, A-B, B-C, C-D, D-E, B-E, E-F, F-G. , , AD .
|
|
|
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24. , : A-D, A-B, B-C, C-D, D-E, B-E, E-F, F-G. , , AD .
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25. , : A-D 1, A-B 7, B-C 2, C-D 5, D-E 1, B-E 9, E-F 1, F-G 2. , , AD .
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26. TCP : 2 2 4 4 1 20 2. : 0.2, 0.2, 0.5. 1, 1, 1. .
2*0.2+2*0.2+4*0.5)/(0.2+0.2+0.5)= 3.11
(2*0.2+4*0.2+4*0.5)/(0.2+0.2+0.5)=3.55
(4*0.2+4*0.2+1*0.5)/(0.2+0.2+0.5)=2.33
(4*0.2+1*0.2+20*0.5)/(0.2+0.2+0.5)=12.22
(1*0.2+20*0.2+2*0.5)/(0.2+0.2+0.5)=5.77
.
(2*1+2*1+4*1)/(1+1+1)= 2.66
(2*1+4*1+4*1)/(1+1+1)=3.33
(4*1+4*1+1*1)/(1+1+1)=3
(4*1+1*1+20*1)/(1+1+1)=8.33
(1*1+20*1+2*1)/(1+1+1)=7.66
, , .
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