| 21. | When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer. |
| a. | Physical |
| b. | Transport |
| c. | Application |
| d. | None of the above |
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Answer: (b).Transport
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| 22. | The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. |
| a. | application |
| b. | network |
| c. | data link |
| d. | physical |
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|
Answer: (a).application
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| 23. | TCP/IP is a ______ hierarchical protocol suite developed ____ the OSI model. |
| a. | seven-layer; before |
| b. | five-layer; before |
| c. | six-layer; before |
| d. | five-layer; after |
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|
Answer: (a).seven-layer; before
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| 24. | The _________ layer enables the users to access the network. |
| a. | transport |
| b. | application |
| c. | data link |
| d. | physical |
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|
Answer: application
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| 25. | The _______ layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format. |
| a. | transport |
| b. | network |
| c. | data link |
| d. | presentation |
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|
Answer: (d).presentation
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| 26. | The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices. |
| a. | transport |
| b. | network |
| c. | session |
| d. | physical |
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|
Answer: (c).session
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| 27. | The ________ layer is responsible for the process-to-process delivery of the entire message. |
| a. | transport |
| b. | network |
| c. | data link |
| d. | physical |
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|
Answer: (a).transport
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| 28. | The ______ layer is responsible for the source-to-destination delivery of a packet across multiple network links. |
| a. | transport |
| b. | network |
| c. | data link |
| d. | physical |
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|
Answer: (b).network
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| 29. | The _______ layer is responsible for delivering data units from one station to the next without errors. |
| a. | transport |
| b. | network |
| c. | data link |
| d. | physical |
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|
Answer: (c).data link
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| 30. | The _______ layer coordinates the functions required to transmit a bit stream over a physical medium. |
| a. | transport |
| b. | network |
| c. | data link |
| d. | physical |
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|
Answer: (d).physical
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