Certified Wireless Network Administrator Exam Questions

Here you have the best CWNP CWNA-108 practice exam questions.

Some things you may want to keep in mind about this practice exam questions:

You have 38 total questions to study from
Each page has 5 questions, making a total of 8 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on September 15, 2024

Question 1 of 38

An RF signal sometimes bends as it passes through some material other than free space. What is the term that describes this behavior?

A.

Refraction

B.

Warping

C.

Scattering

D.

Reflection

Correct Answer: A

Refraction is the term that describes the bending of an RF signal as it passes through a medium other than free space. This phenomenon occurs because the signal changes speed when it enters a medium with a different density, causing a change in direction.

Question 2 of 38

What can an impedance mismatch in the RF cables and connectors cause?

A.

Increased range of the RF signal

B.

Fewer MCS values in the MCS table

C.

Increased amplitude of the RF signal

D.

Excessive VSWR

Correct Answer: D

An impedance mismatch in RF cables and connectors can cause excessive Voltage Standing Wave Ratio (VSWR). VSWR is a measure of how efficiently RF power is transmitted from a power source, through a transmission line, to a load. A high VSWR indicates that there is a reflection of the signal back towards the source due to impedance mismatch, which can result in signal loss and potential damage to the equipment.

Question 3 of 38

What factor does not influence the distance at which an RF signal can be effectively received?

A.

Receiving station's radio sensitivity

B.

Receiving station's output power

C.

Transmitting station's output power

D.

Free Space Path Loss

Correct Answer: B

Receiving station's output power does not influence the distance at which an RF signal can be effectively received. The receiving station's radio sensitivity, transmitting station's output power, and free space path loss are all crucial factors that impact the effective receiving distance of an RF signal. The output power of the receiving station does not affect how far away it can receive signals; rather, it influences its transmission capabilities.

Question 4 of 38

A WLAN transmitter that emits a 50 mW signal is connected to a cable with 3 dB loss. If the cable is connected to an antenna with 9dBi gain, what is the EIRP at the antenna element?

A.

26 dBm

B.

13 dBm

C.

23 dBm

D.

10 dBm

Correct Answer: C

First, convert the 50 mW signal to decibels: 50 mW = 10 * log10(50) = 17 dBm. Next, account for the 3 dB cable loss: 17 dBm - 3 dB = 14 dBm. Then, add the 9 dBi antenna gain: 14 dBm + 9 dBi = 23 dBm. Therefore, the EIRP at the antenna element is 23 dBm.

Question 5 of 38

In a long-distance RF link, what statement about Fade Margin is true?

A.

A Fade Margin is unnecessary on a long-distance RF link if more than 80% of the first Fresnel zone is clear of obstructions.

B.

The Fade Margin is a measurement of signal loss through free space and is a function of frequency and distance.

C.

Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading.

D.

The Fade Margin of a long-distance radio link should be equivalent to the receiver's low noise filter gain.

Correct Answer: C

Fade Margin is an additional pad of signal strength designed into the RF system to compensate for unpredictable signal fading. This ensures that the RF link remains reliable despite potential variations in signal strength due to environmental factors or other unpredictable conditions.