[amp_mcq option1=”Go-back-N ARQ” option2=”Selective Repeat ARQ” option3=”Stop-and-Wait ARQ” option4=”None of the above” correct=”option2″]
The correct answer is: B. Selective Repeat ARQ
Selective Repeat ARQ is a type of ARQ system that introduces the transmission delay between the transmitter and receiver before the reception of frame at receiver for the purpose of error detection. In Selective Repeat ARQ, the receiver only acknowledges the frames that it has received correctly. If a frame is received incorrectly, the receiver will request a retransmission of that frame only. This means that the transmitter does not have to retransmit all of the frames that were sent after the erroneous frame. This reduces the amount of bandwidth that is used and the amount of time that it takes to transmit the data.
Go-back-N ARQ is another type of ARQ system. In Go-back-N ARQ, the receiver acknowledges all of the frames that it has received correctly. If a frame is received incorrectly, the receiver will request a retransmission of all of the frames that were sent after the erroneous frame. This means that the transmitter has to retransmit all of the frames, even the ones that were received correctly. This can waste bandwidth and time.
Stop-and-Wait ARQ is the simplest type of ARQ system. In Stop-and-Wait ARQ, the transmitter sends one frame at a time and waits for an acknowledgment from the receiver before sending the next frame. If the frame is received incorrectly, the receiver will not send an acknowledgment and the transmitter will have to retransmit the frame. This can waste bandwidth and time.
In conclusion, Selective Repeat ARQ is the type of ARQ system that introduces the transmission delay between the transmitter and receiver before the reception of frame at receiver for the purpose of error detection.