In a communication system, the transmission rate is 1Mbps, the
two ways propagation delay is 1ms, and the processing delay is
negligible. Given the frame length of nf=1250 bytes, ACK frame and
frame overhead of 25 bytes, please find the Stop&Wait ARQ
protocol efficiency with channel bit error rate of 10^-5 .
1. Find the propagation delay for a signal traversing the
following networks at the speed of light in cable (2.3 × 108
meter/second).
(a) metropolitan area, 100 km
(b) continent, 5000 km
2. How many (i.e. maximum) bits are in transit during the/a
propagation delay (assuming the pipe is full) in the case (a) of
Question 1 if bits are entering the network at the following
transmission speeds:
(a) 1 Megabits/second
(b) 100 Megabits/second
(c) 10 Gigabits/second
3. In the...
Identify the type of radio wave propagation shown in
figure below: (1 mark )
Give any four characteristics (properties) of radio wave
propagation in the VHF band.
(2 marks )
Maximum line of sight distance between transmitting and receiving
antennas for a space
wave communication system is given as 45 km. The distance of the
horizon from the
transmitting antenna is 28 km. Calculate the height of the
receiving antenna in meters.
What is exception propagation?
Give an example of a class that contains at least two methods,
in which one method calls another. Ensure that the subordinate
method will call a predefined Java method that can throw a checked
exception. The subordinate method should not catch the
exception.
Explain how exception propagation will occur in your
example.
Subject: Computer networks and chapter :packets
1.0. Suppose a link has a propagation delay of 20 µsec and a
bandwidth of 2 bytes/µsec.
(a). How long would it take to transmit a 600-byte packet over
such a link?
(b). How long would it take to transmit the 600-byte packet over
two such links, with a store-and-forward switch in between?
if there is a diagram please draw the diagram