1、艾迪飞IT实验室bbs.edify.com.cn最新CiscoCCNA考试库七十九题 1.What is the correct order for the OSI model? P=Presentation, S=Session, D=Datalink, Ph=Physical, T=Transport, A= Application, N=Network A. P S A PH D N T B. A P S T N D PH C. PH D N T A S P D. P S A T N D PH It is crucial you not only memori
2、ze this and know what each layer does. 2. What is encapsulation? A. Putting the header on an incoming frame B. Putting a header on an incoming segment C. Putting a header on an outgoing frame艾迪飞IT实验室bbs.edify.com.cn D. Putting a header on an outgoing bit This also includes trailers and c
3、an be put on segments, packets, and frames. 3. Which layer is most concerned with user applications? A. Application B. Presentation C. Network D. Physical 4. Which of the following is de-encapsulation? A. Stripping the header from a frame B. Putting a header on a segment C. Puttin
4、g a header on a frame 艾迪飞IT实验室bbs.edify.com.cn D. Stripping a frame from a link This also includes trailers as in question 2. 5. What layer converts data into segments? A. Application B. Presentation C. Transport D. Physical 6. What layer converts data into Packets? A. Network
5、 B. Application C. Physical D. Data Link 艾迪飞IT实验室bbs.edify.com.cn 7. What layer converts data into Frames? A. Application B. Physical C. Data Link D. Transport 8. What layer converts data into bits? A. Application B. Session C. Data Link D. Physical All of the layers nee
6、d to convert data into something that 艾迪飞IT实验室bbs.edify.com.cn they can pass down to the next level, with the exception of the Application layer which hands data to the Presentation layer. The Presentation layer encrypts, and compresses before sending it to the Session layer for it s first c
7、onversion. 9. Which layer is most concerned with getting data from the beginning to the final destination? A. Application B. Presentation C. Session D. Transport 艾迪飞IT实验室bbs.edify.com.cn
