# This elementary problem begins to explore propagation delay and transmission delay, two central concepts in data networking. Consider two hosts,

## Question:

a. Express the propagation delay, dprop ' in terms of In and s.

b. Determine the transmission time of the packet, dtrans,> in terms of Land R.

c. Ignoring processing and queuing delays, obtain an expression for the end -to-end delay.

d. Suppose Host A begins to transmit the packet at time t =O. At time t =dtrans '

where is the last bit of the packet?

e. Suppose dprop is greater than ddrop At time t =dtrans where is the first bit of the packet?

f. Suppose dprop is less than dtrans. At time t =dtrans' where is the first bit of the packet?

g. Suppose s =2.5· 108, L = 120 bits, and R =56 kbps. Find the distance m so that dprop equals dtrans.

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## Step by Step Answer:

**Related Book For**

## Computer Networking A Top-Down Approach

**ISBN:** 978-0136079675

5th edition

**Authors:** James F. Kurose, Keith W. Ross

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