2.1 Transport
[C706] specifies two protocol variants within connection-oriented RPC and connectionless RPC. This specification maintains categorization for the descriptions of the RPC protocol variants.
These extensions update the protocol identifiers that are specified in [C706] Appendix I which specifies that the protocol identifier can be one of three types:
An octet string derived from an interface UUID combined with a version number.
An octet string derived from OSI object identifiers (OIDs).
Single octet identifiers that are registered by the Open Software Foundation for commonly used protocols.
The extensions specified in this document mandate that the third type MUST be used for all communications.
Unless explicitly stated otherwise, the protocol identifier used by each protocol sequence specified in sections 2.1.1 and 2.1.2 is as specified in the table in [C706] Appendix I.
The RPC protocol sequence strings for the RPC transports defined by these extensions are specified in the following table.<1>
|
RPC transport |
RPC protocol sequence string |
|---|---|
|
SMB |
ncacn_np (see section 2.1.1.2) |
|
TCP/IP (both IPv4 and IPv6) |
ncacn_ip_tcp (see section 2.1.1.1) |
|
UDP |
ncadg_ip_udp (see section 2.1.2.1) |
|
SPX |
ncacn_spx (see section 2.1.1.3) |
|
IPX |
ncadg_ipx (see section 2.1.2.2) |
|
NetBIOS over IPX |
ncacn_nb_ipx (see section 2.1.1.4) |
|
NetBIOS over TCP |
ncacn_nb_tcp (see section 2.1.1.5) |
|
NetBIOS over NetBEUI |
ncacn_nb_nb (see section 2.1.1.6) |
|
AppleTalk |
ncacn_at_dsp (see section 2.1.1.7) |
|
RPC over HTTP |
ncacn_http (see section 2.1.1.8) |