[問題] 如何計算frame size?
1.
Consider a CSMA/CD network running at 1 Gbps over a 1-km calbe with no
repeaters. The signal speed in the cable is 200,000km/sec. What is the
minimum frame size?(note:1Gbps=1,000,000,000 bits/sec)
2.
A TCP machine is sending windows of 65535 bytes over a 1-Gbps channel that
has a 10-msec one-way delay.What is the maximum throughput achievable?
what is the line efficiency?
3.
If message, 01110011001, is send and a special bit pattern,01110, is applied
as the leading flag of the message. The generator ploynomial G(x)=x^4+x^2+x+1,
is used for CRC examination.
1.Is the CRC check used for error detection or error correction?
2.Find the checksum?
3.If the frame shall be transmitted as
---------------------------------------------
|Leading Flag |Message body | CRC checksum |
---------------------------------------------
Construct the bit pattern the frame to be transmitted(hint:bit stuffing)
4.
The mzsimum payload of a TCP segment is 65495 bytes. Why was such a
strange number chosen?
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