All too often, that's something predetermined either by the server-side developers or, in most cases, by hooking into a pre-existing Web service that only supports a specific protocol.
很多情况下，这是由服务器端开发人员预先确定好的，也可能挂钩预先存在的web服务，而该服务只支持某种特定的协议。
Every device defines its own protocol, including whether or not it supports commands at all.
每个器件定义了它们自己的协议，包括它们是否支持命令。
The Spektrum high resolution protocol supports 2048 Steps on more than 7 Channels for all modern Spektrum and JR Radios.
高分辨率的利用等候协议支持2048步骤就超过7频道的所有现代利用等候和JR收音机。
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