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2.1 Transport

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The RDP protocol packets are encapsulated in the User Datagram Protocol (UDP). The UDP datagrams MUST be encapsulated in the Internet Protocol version 4 (IPv4) or the Internet Protocol version 6 (IPv6).

The default port for incoming UDP connection requests on the terminal server is port 3389. All of the RDP traffic over UDP is handled by this single port on the terminal server.

The terminal client MUST open a unique UDP socket for each instance of this transport. Each socket is bound to a different port.