TCP/IP (71) layer protocols provide services to the application (72) running on a computer. The application layer does not define the application itself, but rather it defines (73) that applications need--like the ability to transfer a file in the case of HTTP. In short, the application layer provides an (74) between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP (75) layer consists of two main protocol options--the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).

（71）处填（）。

A．application

B．transport

C．link

D．network

关于VMS中各角色的岗位制约关系，下列说法错误的是（）。

A.调拨不得兼任现金管库岗、清分管理岗

B.运营主管不得兼任管库岗、清分管理岗

C.调拨、清分、管库不得处理ABIS账务

D.ABIS九级主管在进行业务授权的情况下，可以兼任系统管理员