Homework Homework Chapter Chapter 2 (Group) (Group)
P5: 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, dprop in terms of m and s
B. Determine the transmission time of the packet dtrans in terms of L and R.
C. Ignoring nodal 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=0. At time t=dtrans
where is the last bit of the packet?
E. Suppose dprop is greater than dtrans. 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.