47 lines
844 B
Markdown
47 lines
844 B
Markdown
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# Introduction
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`ACK` is a command introduced with [MSNP2](../versions/msnp2.md).
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It is a Switchboard Server command, without a response payload.
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Used as a positive response to [MSG](msg.md) A, and later [MSG](msg.md) D commands.
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# Client/Request
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This command can not be sent from the client.
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# Server/Response
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`ACK TrID`
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# Examples
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## As a response to MSG A
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```
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C: MSG 1 A 68
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MIME-Version: 1.0
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Content-Type: text/plain;charset=UTF-8
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message
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S: ACK 1
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```
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## As a response to MSG D
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*This only happens in [MSNP9](../versions/msnp9.md).*
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```
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C: MSG 2 D 73
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MIME-Version: 1.0
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Content-Type: application/octet-stream
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data message
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S: ACK 2
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```
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## Invalid context
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*Inherited from being an unimplemented command.*
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```
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C: ACK 3
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```
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Server disconnects client.
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# Known changes
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* [MSNP9](../versions/msnp9.md): Now happens as a response to MSG D.
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