DATA LINK LAYER WIRED NETWORKS
DATA LINK CONTROL DLC
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What is a disadvantage of ARQ over FEC?
|
|
You may retransmit data a lot, which causes delays.
|
|
|
It cannot fix all errors.
|
|
|
You have to send a lot of redundant data which reduces data transfer speed.
|
|
|
It isn’t practical for most types of network.
|
Explanation:
Detailed explanation-1: -Disadvantages of Stop and Wait Protocol The receiver does not send an acknowledgement because it does not receive the data. The sender won’t send the subsequent packet because it has not received any acknowledgement. The lost data is the root cause of this issue.
Detailed explanation-2: -The FEC code is chosen to correct an expected subset of all errors that may occur, while the ARQ method is used as a fall-back to correct errors that are uncorrectable using only the redundancy sent in the initial transmission.
There is 1 question to complete.