This elementary problem begins to explore propagation delayand transmission delay, two
central concepts in data networking. consider two hosts a andb, connected by a single link of
rate r bps. suppose that the two hosts are separated by mmeters, and supose the propagation speed
along the link is s meters/sec. host a is to send a packet ofsize l bits to host b.

a. express the propagation delay d(prop) interms of l and r.
b. determine the trnasmission time of the packet d(trans) in termsof l and r.
c. ignoring processing and queing delays obtain an expression forthe end to end delay.
d. supose host a begins to transmit packet at time t=0 . at timet=d(trans) where is the last bit of the packet.
e. suppose d(prop)is greater than d(trans) . at time t= d(trans)where is the first bit of the packet
f. suppose d(prop)is less than d(trans) . at time t= d(trans) whereis the first bit of the
packet
g. suppose s=2.5* 10power(8), l=100 bits and r=28 kbps. find thedistance m so tha d(prop) equals d(trans).