This document provides data about the costs of transmitting frames and packets with and without error checking at different layers. It asks to calculate the average costs of sending a packet if error checking is done at the data link layer versus the network layer, and to determine the best layer to perform error checking based on the costs.
Plant propagation: Sexual and Asexual propapagation.pptx
3. Re-examine case #2 with the following dataP = 0.001 .pdf
1. 3. Re-examine case #2 with the following data:
P = 0.001 error rate of a frame (probability of frame error)
Cf = 10 cost of transmitting a frame (without error checking)
Ef = 1.2 cost of error checking a frame at the Data Link Layer.
Packet size 10 frames/packet
Cp = 100 cost of transmitting a packet (without error checking)
Ep = 10 cost of error checking a packet at TCP Layer.
a) What is the average cost of sending a packet if it does error checking at the Data Link Layer?
b) What is the average cost of sending a packet if it does error checking at the Network Layer?
c) In this case, where do you think the error checking should be done?