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 memorize 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　

　　D. Putting a header on an outgoing bit　

　　This also includes trailers and can 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. Putting a header on a frame　

　　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　

　　B. Application　

　　C. Physical　

　　D. Data Link　

　　7. What layer converts data into Frames?