How does NETTCP manage packet losses?

How does NETTCP manage packet losses?

• A. By increasing the bandwidth
• B. By using selective acknowledgment to manage retransmissions
• C. By dropping all duplicate packets
• D. By increasing buffer size

Answer: (B)

NETTCP manages packet losses primarily through the use of selective acknowledgment (SACK). This technique enables the receiver to inform the sender about all segments that have been received successfully, including those that may have arrived out of order. When a packet is detected as lost, the sender can retransmit only those specific packets that were not acknowledged, rather than the entire window of packets. This selective retransmission approach enhances efficiency and reduces unnecessary network traffic, as it avoids resending data that has already been successfully received. In contrast, increasing bandwidth might improve throughput but does not directly address issues related to packet loss; dropping all duplicate packets could lead to the loss of important data and hinder communication effectiveness; and simply increasing buffer size may help manage congestion but does not resolve the underlying issue of lost packets. Therefore, the use of selective acknowledgment stands out as the most effective method for handling packet loss in NETTCP.

NETTCP manages packet losses primarily through the use of selective acknowledgment (SACK). This technique enables the receiver to inform the sender about all segments that have been received successfully, including those that may have arrived out of order. When a packet is detected as lost, the sender can retransmit only those specific packets that were not acknowledged, rather than the entire window of packets. This selective retransmission approach enhances efficiency and reduces unnecessary network traffic, as it avoids resending data that has already been successfully received.

In contrast, increasing bandwidth might improve throughput but does not directly address issues related to packet loss; dropping all duplicate packets could lead to the loss of important data and hinder communication effectiveness; and simply increasing buffer size may help manage congestion but does not resolve the underlying issue of lost packets. Therefore, the use of selective acknowledgment stands out as the most effective method for handling packet loss in NETTCP.