Recall the accuracy of CRC codes in terms of their ability t

Recall the accuracy of CRC codes, in terms of their ability to detect all errors. In that context, in a subnet in which all hosts, routers, and software is free of errors, how can a packet be delivered incorrectly?

Solution

Answer:

CRC checks if there is an error in any frame to be sent accross the channel. If everything is perfect :

The only problem could be the delivery of the packet. Packet might be incorrect but it can be delivered to other destination incorrectely. Suppose , we want to send the packet B but incorrectly it is been sent to the host A. This could be one of the faults of delivery of the packets incorrectly.