RFC 2782:A DNS RR for specifying the location of s...
RFC-Ref

unsigned integer


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... range is 0-65535. This is a 16 bit unsigned integer in network byte order. ...
... range of this number is 0-65535. This is a 16 bit unsigned integer in network byte order. Domain ...
... range is 0- 65535. This is a 16 bit unsigned integer in network byte order. This is often as specified in Assigned Numbers but need not be. ...



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