TRANSPORT LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -A sack in football occurs when the quarterback who drops back to pass is tackled behind the line of scrimmage. This happens only on a pass play when the quarterback throws the ball to another receiver. The sack often results in a loss of yards, which gives the defense an advantage.
Detailed explanation-2: -SACK numbers are a more efficient way of retransmitting lost packets. Traditionally, lost packets will result in a retransmission of lost and some received packets since the receiver can only tell the sender the last contiguous sequence number received. SACK will define a range of what was received.
Detailed explanation-3: -D-SACK block is used to report duplicate contiguous sequence of data received by the receiver in the most recent packet. Each duplicate is reported at most once. Allows the sender TCP to determine when a retransmission is not necessary.