| 摘要 |
<p>In a communication method between a client device and a print server an initialisation phase comprises a UDP request to obtain a special port number for HTTP print requests to the server, which tests the viability of UDP communications between the client and server, a general registration message from the client to the print server using HTTP, and finally a UDP communications registration message from the client to the server using UDP, which also tests the viability of UDP communications between the client and server. If UDP communications are viable the client and print server use UDP for subsequent communications about printing, otherwise HTTP is used.</p> |
