Next Generation Wireless Network MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Next Generation Wireless Network, a fundamental topic in the field of Cognitive Radio. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Next Generation Wireless Network MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Next Generation Wireless Network mcq questions that explore various aspects of Next Generation Wireless Network problems. Each MCQ is crafted to challenge your understanding of Next Generation Wireless Network principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Cognitive Radio tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Next Generation Wireless Network MCQs are your pathway to success in mastering this essential Cognitive Radio topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Next Generation Wireless Network. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Next Generation Wireless Network knowledge to the test? Let's get started with our carefully curated MCQs!

Next Generation Wireless Network MCQs | Page 14 of 33

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Q131.
Which among the following factors influence round trip time?

a.

Access technology

b.

Power efficiency

c.

Cost

d.

Frequency of operation

Discuss
Answer: (d).Frequency of operation Explanation:Round trip time depends on the frequency of operation. An increased number of link layer retransmissions is required to send a packet across the wireless channel when a high packet error rate is observed at a particular frequency band.
Q132.
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

Discuss
Answer: (a).Spectrum handoff latency is the time taken to switch to a new frequency during handoff Explanation:Depending on the available spectrum, the operational frequency of the radio changes with time. When the radio changes its frequency of operation, the time taken for the new frequency to become operational is called spectrum handoff.
Q133.
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

Discuss
Answer: (c).Round trip time Explanation:High spectrum handoff latency leads to increased round trip time. This in turn leads to retransmission time out. Existing protocols deduce the cause as packet loss and invoke the congestion avoidance mechanism resulting in the decrease of throughput. Cognitive radio network requires transport protocols that support spectrum mobility.
Q134.
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

Discuss
Answer: (a).Selection of a spectrum band for transmission Explanation:In multipath routing, the multiple paths are discovered first. The routes are evaluated on route metrics such as delay and link stability, and then the node selects a route for transmission. One approach is to employ dynamic source routing for route discovery. Multipath routing suits the dynamic nature of cognitive networks and exhibits increased efficiency.
Q135.
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

Discuss
Answer: (c).Tree based routing is a centralized routing scheme controlled by a single network entity Explanation:Tree based routing is a centralized network scheme controlled by a single network entity. xG users register at the centralized entity. One approach is to construct a route based on end to end throughput at the centralized entity using the minimum spanning tree algorithm.
Q136.
Which unit is responsible for initiating local coordination?

a.

Primary user

b.

Secondary user

c.

Central entity

d.

Intermediary node

Discuss
Answer: (d).Intermediary node Explanation:Local coordination routing is a combination of routing and spectrum assignment protocol, and local coordination scheme. The routing and spectrum assignment protocol generates multiple paths and assigns a cost for each hop in the path. The intermediary nodes initiate local coordination and find alternate paths to tackle link failure.
Q137.
Which among the following occurs when intermediary nodes choose identical frequency bands?

a.

Link failure

b.

Increased cost

c.

Increased power

d.

Increased delay

Discuss
Answer: (d).Increased delay Explanation:In the location coordination scheme, multihop paths are created, where intermediary nodes might select an identical frequency band. It results in increased switching delay. This can be avoided by introducing a scheduling mechanism such as polling.
Q138.
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

Discuss
Answer: (a).Spectrum aware routing does not require local spectrum knowledge Explanation:Spectrum aware routing operates with global knowledge as well as with local knowledge. Each user is aware of another user when global knowledge is available. Otherwise each user constructs spectrum routes using spectrum availability information obtained locally by distributed protocol.
Q139.
Which layer is associated with based utility attack?

a.

Physical layer

b.

Data link layer

c.

Network layer

d.

Transport layer

Discuss
Answer: (b).Data link layer Explanation:Based utility attack involves the modification of characteristics of function parameters to obtain more bandwidth. It increases the amount of delay in the network. It is observed in the data link layer.
Q140.
A key depletion attack is a malicious attack on the network layer.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False Explanation:The key depletion attack is a malicious attack on the transport layer. It is employed to destruct the underlying cipher system. It leads to the degradation of the efficiency of communication.
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