MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Cognitive Radio knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A key depletion attack is a malicious attack on the network layer. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Which layer is associated with based utility attack? |
| A. | Physical layer |
| B. | Data link layer |
| C. | Network layer |
| D. | Transport layer |
| Answer» C. Network layer | |
| 3. |
Which among the following statements is false about spectrum aware routing? |
| A. | Spectrum aware routing does not require local spectrum knowledge |
| B. | Spectrum aware routing requires cooperation sensing |
| C. | Spectrum aware routing performs poorly during link failure |
| D. | Spectrum aware routing does not generate large overhead |
| Answer» B. Spectrum aware routing requires cooperation sensing | |
| 4. |
Which among the following occurs when intermediary nodes choose identical frequency bands? |
| A. | Link failure |
| B. | Increased cost |
| C. | Increased power |
| D. | Increased delay |
| Answer» E. | |
| 5. |
Which unit is responsible for initiating local coordination? |
| A. | Primary user |
| B. | Secondary user |
| C. | Central entity |
| D. | Intermediary node |
| Answer» E. | |
| 6. |
Which among the following is true about tree based routing? |
| A. | Tree based routing is a distributed routing scheme controlled by a multiple network entities |
| B. | Tree based routing is a distributed routing scheme controlled by a single network entity |
| C. | Tree based routing is a centralized routing scheme controlled by a single network entity |
| D. | Tree based routing is a centralized routing scheme controlled by a multiple network entities |
| Answer» D. Tree based routing is a centralized routing scheme controlled by a multiple network entities | |
| 7. |
Which among the following is the first step in multipath routing? |
| A. | Selection of a spectrum band for transmission |
| B. | Identification of multi-paths |
| C. | Evaluation of route metrics |
| D. | Selection of route metrics |
| Answer» B. Identification of multi-paths | |
| 8. |
Which among the following increases with an increase in spectrum handoff latency? |
| A. | Overhead |
| B. | Time of arrival |
| C. | Round trip time |
| D. | Link layer delay |
| Answer» D. Link layer delay | |
| 9. |
What is spectrum handoff latency? |
| A. | Spectrum handoff latency is the time taken to switch to a new frequency during handoff |
| B. | Spectrum handoff latency is the period over which an xG user can use licensed band before handoff |
| C. | Spectrum handoff latency is the time taken to estimate the path between a current licensed band and a new licensed band |
| D. | Spectrum handoff latency is the time taken to send handoff information to the spectrum broker |
| Answer» B. Spectrum handoff latency is the period over which an xG user can use licensed band before handoff | |
| 10. |
Which among the following factors influence round trip time? |
| A. | Access technology |
| B. | Power efficiency |
| C. | Cost |
| D. | Frequency of operation |
| Answer» E. | |
| 11. |
Which among the following influences packet loss probability? |
| A. | Operation frequency |
| B. | Interference level |
| C. | Available bandwidth |
| D. | Medium Access Control protocol |
| Answer» E. | |
| 12. |
Which among the following does not cause performance degradation on TCP level? |
| A. | Link error |
| B. | Packet loss |
| C. | Admission control |
| D. | Access delay |
| Answer» E. | |