> UAS receives a request via UDP ( sent-protocol 
> in via is UDP ).  The response to be sent has 
> big body and exceeding the maximum transmission 
> unit.  whether UAS can send the response via TCP?

No.  Selecting transport based upon message size only applies to requests.
I assume that it is because the transport of the Via entry should match the
transport being used; and the Via entry's transport value is part of the
request and response matching process.


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