| 81. | Which of the following layer protocols are responsible for user and the application programme support such as passwords, resource sharing, file transfer and network management? |
| a. | Layer 2 protocols |
| b. | Layer 5 protocols |
| c. | Layer 7 protocols |
| d. | Layer 10 protocols |
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Answer: (c).Layer 7 protocols
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| 82. | Which layer of OSI determines the interface of the system with the user? |
| a. | Session |
| b. | Network |
| c. | Data-link |
| d. | Application |
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Answer: (d).Application
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| 83. | Which of the following statement is incorrect ? |
| a. | The second layer of communication is the data-link layer |
| b. | Errors in the physical layer can be detected by the data link layer |
| c. | The fourth layer, in reference to the OSI model, is the session layer |
| d. | The CCITT Recommendation X.25 specifies three layers of communication: physical, link and network |
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Answer: (c).The fourth layer, in reference to the OSI model, is the session layer
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| 84. | The network layer, in reference to the OSI model, provide |
| a. | the virtual circuit interface to packet-switched service |
| b. | the interface between the X.25 network and packet mode device |
| c. | data link procedures that provide for the exchange of data via frames that can be sent and received |
| d. | All of the above |
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Answer: (a).the virtual circuit interface to packet-switched service
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| 85. | In OSI model, which of the following layer provides error-free delivery of data? |
| a. | Network |
| b. | Session |
| c. | Data link |
| d. | Transport |
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Answer: (d).Transport
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| 86. | An international standard, multilevel set of protocols to promote compatibility among telecommunications networks. Select the best fit for answer: |
| a. | OSI |
| b. | Network Server |
| c. | Virtual Private Network |
| d. | Network operating system |
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Answer: (a).OSI
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| 87. | What OSI layer handles logical address to logical name resolution? |
| a. | Physical |
| b. | Data Link |
| c. | Transport |
| d. | Presentation |
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Answer: (c).Transport
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| 88. | Who originally designed TCP/IP? |
| a. | IBM |
| b. | Xerox |
| c. | Novell |
| d. | The Department of Defense |
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Answer: (d).The Department of Defense
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| 89. | In OSI model, which of the following layer transforms information from machine format into that understandable by user |
| a. | session |
| b. | physical |
| c. | application |
| d. | presentation |
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Answer: (d).presentation
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| 90. | In OSI network architecture, the dialogue control and token management are responsibilities of |
| a. | session layer |
| b. | network layer |
| c. | transport layer |
| d. | data link layer |
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Answer: (a).session layer
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