This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking. Consider two hosts, A and B, connected by a single link. A is to send a packet to B. Assume dtrans and dprop represent transmission and propagation delay.

a. Suppose Host A begins to transmit the packet at time t = 0. At time t = dtrans, where is the last bit of the packet and why?

b. Suppose dprop > dtrans. At time t = dtrans, where is the first bit of the packet and why? c. Suppose dprop < dtrans. At time t = dtrans, where is the first bit of the packet and why?

Question

7 April, 23:50

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Answers (1)

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Tristian Nicholson · Answer 1

Solution

a)

The "bit" is just leaving "Host A"

b)

The 1st bit is in the link and has not reached "Host B"

c)

The 1st bit has reached "Host B"