計組作業
課本習題 p40
Ex 1.50
題目：...（要抄）
中譯：...（翻譯題目）
解答：...
助教說：9/18(一)上課之前交到系辦公室
題目：
1.50 <1.3> End-to-end delay is and important performance metric for networks.
It is the time between the point when the source starts to send data and the
point when the data is completely delivered to the destination. Consider two
hosts A and B, connected by a single link of rate R bps. Suppose the two
hosts are separated by m meters, and suppose the propagation speed along the
link is s m/sec. Host A is sending a file of size L bits to host B.
a.Obtain an expression for the end-to-end delay in terms of R, L, m, and s.
b.Suppose there is a router between A and B, and the data from A must be
forwarded to B by the router. If the forwarding process takes t sec, then
what is the end-to-end delay?
c.Suppose the router is configured to provide QoS (Quality of Service)
control for different kinds of data. If the data is multimedia stream,
such as video conference data, if will forward it at a shorter delay of
t/2 sec.For other kinds of data, the delay is t sec. If host A is
sending a multimedia stream of size 2L, what is the end-to-end delay?
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