2.1 Transport

The Print System Asynchronous Remote Protocol specifies the following transport requirements:

• This protocol uses:

  • The transport remote procedure call (RPC) over TCP/IP ([MS-RPCE] section 2.1.1.1).

  • RPC dynamic endpoints ([C706] section 4).

  • The UUID that is specified in section 1.9.

  • Packet privacy (RPC_C_AUTHN_LEVEL_PKT_PRIVACY) authentication level for both client and server ([MS-RPCE] section 2.2.1.1.8).<2>

• A server of this protocol uses:

  • A Simple and Protected GSS-API Negotiation Mechanism (SPNEGO) [MS-SPNG] security provider ([MS-RPCE] section 3).

  • The default server principal name for the security provider, which is the authentication-service constant RPC_C_AUTHN_GSS_NEGOTIATE.<3>

• A client of this protocol uses:

  • A SPNEGO [MS-SPNG] security provider.

  • A principal name constructed by appending the name of the print server to the string "host/".

  • Packet authentication level ([MS-RPCE] section 3).

• A server of this protocol SHOULD<4> impersonate the client while processing a method.