该协议具有四种传输方式，即控制传输、批量传输、终端传输和等时传输。
USB protocol has four transfer types: Control transfer, Bulk transfer, Interrupt transfer, and Isochronous transfer.
认证、授权和计费(AAA)协议，如TACACS和RADIUS，当初是为了对终端访问服务和PPP拨号服务实行访问控制而开发的。
Authentication, Authorization and Accounting (AAA) protocols such as TACACS and RADIUS were initially deployed to provide dial-up PPP and terminal server access.
本协议可用于两个低比特率多媒体终端之间，或一个低比特率多媒体终端与一个多点控制单元或一个交互操作适配器之间。
This protocol can be used between two low bit rate multimedia terminals, or between a low bit rate multimedia terminal and a multipoint control unit or an interworking adapter.
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