31. | The _______ layer links the network support layers and the user support layers. |
a. | transport |
b. | network |
c. | data link |
d. | session |
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Answer: (a).transport
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32. | The session, presentation, and application layers are the ____ support layers. |
a. | user |
b. | network |
c. | both (a) and (b) |
d. | neither (a) nor (b) |
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Answer: (a).user
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33. | The physical, data link, and network layers are the ______ support layers. |
a. | user |
b. | network |
c. | both (a) and (b) |
d. | neither (a) nor (b) |
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Answer: (b).network
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34. | The seven-layer _____ model provides guidelines for the development of universally compatible networking protocols. |
a. | OSI |
b. | ISO |
c. | IEEE |
d. | none of the above |
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Answer: (a).OSI
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35. | The ____ created a model called the Open Systems Interconnection, which allows diverse systems to communicate. |
a. | OSI |
b. | ISO |
c. | IEEE |
d. | none of the above |
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Answer: (b).ISO
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36. | __________ provides full transport layer services to applications. |
a. | TCP |
b. | UDP |
c. | ARP |
d. | none of the above |
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Answer: (a).TCP
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37. | In the OSI model, encryption and decryption are functions of the ________ layer. |
a. | transport |
b. | session |
c. | presentation |
d. | application |
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Answer: (c).presentation
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38. | In the OSI model, what is the main function of the transport layer? |
a. | node-to-node delivery |
b. | process-to-process message delivery |
c. | synchronization |
d. | updating and maintenance of routing tables |
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Answer: (b).process-to-process message delivery
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39. | In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer. |
a. | physical |
b. | transport |
c. | session |
d. | presentation |
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Answer: (c).session
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40. | In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______. |
a. | added |
b. | removed |
c. | rearranged |
d. | modified |
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Answer: (b).removed
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