Cross Layer Design MCQs : This section focuses on the "Cross Layer Design" in Cognitive Radio. These Multiple Choice Questions (MCQs) should be practiced to improve the Cognitive Radio skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
_______________ refers to sharing information among layers for efficient use of network resources and achieving high adaptivity.
A. Simple-layer design
B. Cross-layer design
C. Complex-layer design
D. Single-layer design
Explanation: Cross-layer design refers to sharing information among layers for efficient use of network resources and achieving high adaptivity.
In cross-layer design, each layer is characterized by ?
B. control knobs
C. Both A and B
D. None of the above
Explanation: In cross-layer design, each layer is characterized by a few key parameters and control knobs.
The Wireless Network protocol stack can be divided into ________ parts.
Explanation: The WSN protocol stack can be divided into six parts: Physical Layer, Data Link Layer, Network Layer, Transmission Control Layer, Application Support Layer, and Network Management Layer.
Cross layer approach is more favorable in wireless sensor networks?
C. Can be true or false
D. Can not say
Explanation: Cross-layer designs have recently emerged as an effective approach and have been widely applied to wireless sensor networks. Constraints on energy, memory, storage resources, and low radio transmission capabilities of the wireless sensor nodes make cross-layer support more attractive.
Which parameter can be optimized by Cross layer design?
D. All of the above
Explanation: All of the above are parameter can be optimized by Cross layer design.
Which among the following is a disadvantage of the signaling pipe?
A. Lack of instant signaling
B. Separate headers for non-adjacent layers
C. Unreliable delivery of information
D. Generation of interface between non-adjacent layers
Explanation: Interlayer signaling allows signaling information to pass from layer to layer along with packet flow. The processing path in the protocol stack may pass from top to bottom or from bottom to top. This is not suitable for cross-layer implementation since it requires instant signaling.
Which among the following statements is false about cross-layer design?
A. High quality of service can be provided by exchanging information among all layers of the protocol stack
B. Diverse waveforms are employed for power and modulation process
C. Cross-layer design helps to eliminate channel variations caused by blurring
D. Cross-layer design makes channel connections unpredictable
Explanation: Cross-layer design creates diverse waveforms to establish predictable connections under the existing channel conditions and medium access control parameters. High quality of service can be provided by exchanging information among all layers of the protocol stack. Cross-layer design also helps to achieve higher throughput.
Which among the following is a building unit of cross-layer hub?
A. Cross-layer interface
B. Cross-layer scheduler
C. Cross-layer intra hub module
D. Cross-layer director
Explanation: Cross design involves the sharing of information among different layers of the protocol stack.
Which among the following is not a cross-layer design challenge associated with the lower layer of the protocol stack?
A. Interference mitigation
B. Topology configuration
C. Cooperative sensing
D. Energy consumption
Explanation: Spectrum sensing is capable of detecting interference only at the transmitters. Interference measurements should be shared to identify the amount of interference at other users and receivers.
Cross-layer communication between data link and network layer can minimize the wastage of resources caused by packet loss.
C. Can be true or false
D. Can not say
Explanation: Cross-layer communication between data link and network layer can minimize the wastage of resources caused by packet loss. One approach involves allocating the resources for link-layer needs based on hop count in the network layer module. For higher hop count, the power is divided among the packets, and the best available channel is selected for transmission.