题目

多项选择题

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选项

A.The packet transmission time is 10 ms (milliseconds) for a 200B packet with a transmission bit rate of 20Mb/s

B.The packet transmission time is 10 ms (milliseconds) for a 200B packet with a transmission bit rate of 20Mb/s

C.The Generator Polynomial X^16 + X^8 + X + 1 gives a 16 bit CRC

D.Consider this Control field in HDLC: 10011101 This is a Supervisory Frame (S-Frame)

E.Consider this Control field in HDLC: 10011101 This is a Supervisory Frame (S-Frame)

F.Consider this Control field in HDLC: 10011101 This is a Supervisory Frame (S-Frame)

G.The Threshold can exceed the Receivers Advertised Window in TCP congestion control

H.The Broadcast address for this IP address 156.230.210.17/22 is 156.230.210.255

I.If the Hamming distance between code words is eight, then it can detect seven bit errors and correct three bit errors.

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标准答案

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思路分析

Step through each answer option and evaluate its correctness based on standard networking and coding theory facts. Option 1: The packet transmission time is 10 ms (milliseconds) for a 200B packet with a transmission bit rate of 20Mb/s To compute transmission time, convert the payload to bits and divide by the bit rate: 200 bytes = 1600 bits. At 20 megabits per second, time = 1600 bits / 20,000,000 bits/s = 0.00008 seconds = 0.08 ms. Therefore, the claim of 10 ms is incorrect by a large margin; this option is fals......Login to view full explanation

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