1. Which of the following services uses a process called windowing (下面的哪一个服务使用了所谓的窗口机制.？

　　A. Reliable data transfer

　　B. Connection-oriented virtual circuit

　　C. Buffered transfer

　　D. Resequencing

　　E. Multiplexing

　　F. Efficient, full-duplex transmission

　　G. Flow control

　　12. What is UDP (什么是U D P .？

　　A. An API that makes the transport layer independent

　　B. A connectionless, unreliable transport protocol

　　C. An API that allows multiple applications to share a network connection

　　D. A function that makes remote procedures appear to be local
　题库精选CCNA考试自测题第1卷_第3页
中华IT学院   【大 中 小】  [ 2011年5月23日 ]
-
　　13. Which of the following best describes TCP/IP (下面的哪句话最准确地说明了T C P / I P .？

　　A. A static protocol

　　B. A proprietary protocol

　　C. A collection of internetworking protocols

　　14. UDP and TCP represent mechanisms used by which layer of the TCP/IP (UDP和T C P表示了T C P / I P的哪层使用的机制.？

　　A. Data link layer

　　B. Physical layer

　　C. Presentation layer

　　D. Transport layer

　　15. RPCs provide which of the following (RPC提供了下面的哪个功能.？

　　A. Connection-oriented session

　　B. Transparency to make remote calls look local

　　C. Portability of applications between heterogeneous systems

　　D. A and C only

　　E. B and C only

　　F. A, B, and C