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What is a block acknowledgement (Block Ack)?

ack Acknowledgement block
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What is a block acknowledgement (Block Ack)?

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10

Instead of sending an acknowledgement for each frame, 802.11n allows a receiver to cumulatively acknowledge multiple frames with a single Block Ack. Block Ack was first proposed in the IEEE 802.11e standard and has been enhanced in 802.11n.

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