This elementary problem begins to explore propagation delay and transmis- sion delay, two central concepts in data networking. Consider two hosts, A and B, connected by a single link of rate R bps. Suppose that the two hosts are separated by m meters, and suppose the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to Host B a. Express the propagation delay, dprops in terms of m and s
b. Determine the transmission time of the packet, drans, in terms of L and R.
c. Ignoring processing and queuing delays, obtain an expression for the end-
d. Suppose Host A begins to transmit the packet at time t = 0. At time t = dtrans'
e. Suppose drop is greater than dran . At time t = d, ans, where is the first bit of
f. Suppose dprop is less than dtrans. At time t = dtrans, where is the first bit of
g. Suppose s = 2.5-108, L = 120 bits, and R = 56 kbps. Find the distance m so that dprop equals drans