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acknowledgment flag (TCP) (ACK)

The acknowledgement frame (ACK) is used in data transmission for flow control in an end-to-end connection. As a positive acknowledgement, the ACK frame is transmitted to confirm the receipt of one or more data packets.

The ACK flag or frame is used in various protocols such as the TCP protocol or Fibre Channel( FC). For example, as a bit indicator in the control flag field of the TCP header. A set flag indicates that the acknowledgement number entered in the acknowledgement field is relevant.

Acknowledgement flag in the TCP header

Acknowledgement flag in the TCP header

In Fibre Channel it is used in the FC service classes Class 1 and Class 2 to acknowledge the receipt of one or more data packets.

Informations:
Englisch: acknowledgment flag (TCP) - ACK
Updated at: 05.11.2011
#Words: 112
Links: frame, data transmission, flow control, connection, arsenic (As)
Translations: DE
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