NetworkAddress is an abstract type for the transport-specific address of a DC represented as a string. For the SMTP transport, the address is an SMTP address (as specified in [RFC2821] and [MS-SRPL]). For the RPC transport in AD DS, the NetworkAddress is a fully qualified DNS name corresponding to the DC.
In the preceding format:
<DC-name> is an IP address in the UTF-8 format, a fully qualified DNS name, or a NetBIOS name.
The colon (":") is the literal separator between the DC-name and the DC-identifier.
A NetworkAddress is stored as an mtx_name within an MTX_ADDR structure or in a location that is pointed to by the cbpszInstanceOffset member of the DSA_RPC_INST structure, which in turn is stored within a REPS_TO structure. The concrete representation of NetworkAddress in these concrete structures is the same as the abstract representation described above.