- | P a g e
CIT 345 Final Actual EXAM Newest 2025/2026 With Complete Questions And Correct Answers |Already Graded A+||Brand New Version!|
When calculating the link budget and system operating margin of a point-to-point outdoorWLAN bridge link, what factors should be taken into account? (Choose all that apply.) - ANSWER-A. Distance B.Receive sensitivity C. Transmit amplitude D. Antenna height E. Cable loss F. Frequency
The sum of all the components from the transmitter to the antenna, not including the antenna, is known as what? (Choose two.) - ANSWER-A.IR D. Intentional radiator
The highest RF signal strength that is transmitted from an antenna is known as what? - ANSWER-A. Equivalent isotropically radiated power
Select the absolute units of power. (Choose all that apply.) - ANSWER-
- Watt B. Milliwatt D. dBm
Select the units of comparison (relative). (Choose all that apply.) - ANSWER-B. dBi C. Decibel D. dBd E. Bel 1 / 4
- | P a g e
- dBd is equal to how many dBi? - ANSWER-C. 4.14 dBi
23 dBm is equal to how many mW? - ANSWER-A. 200 mW
A wireless bridge is configured to transmit at 100 mW. The antenna cable and connectorsproduce a 3 dB loss and are connected to a 16 dBi antenna. What is the EIRP? - ANSWER-C. 2,000 mW
A WLAN transmitter that emits a 400 mW signal is connected to a cable with a 9 dB loss. If the cable is connected to an antenna with 19 dBi of gain, what is the EIRP? - ANSWER-A. 4 W
WLAN vendors use RSSI thresholds to trigger which radio card behaviors? - ANSWER-B. Roaming D. Dynamic rate switching
Received signal strength indicator (RSSI) metrics are used by 802.11 radios to define which RF characteristics? (Choose all that apply.) - ANSWER-A. Signal strength
dBi is a measure of what? - ANSWER-B. The signal increase caused by the antenna
- / 4
- | P a g e
Which of the following are valid calculations when using the rule of 10s and 3s? (Choose all that apply.) - ANSWER-A. For every 3 dB of gain (relative), double the absolute power (mW). F. For every 10 dB of loss (relative), divide the absolute power (mW) by a factor of 10.
A WLAN transmitter that emits a 100 mW signal is connected to a cable with a 3 dB loss. If the cable is connected to an antenna with 7 dBi of gain, what is the EIRP at the antenna element? - ANSWER-B. 250 mW
In a normal wireless bridged network, the greatest loss of signal is caused by what component? - ANSWER-D. Free space path loss
To double the distance of a signal, the EIRP must be increased by how many dBs? - ANSWER-B. 6 dB
During a site survey in a manufacturing plant, the WLAN engineer determines that thenoise floor is extremely high because of all the machinery that is operating in the plant. Theengineer is worried about a low SNR and poor performance due to the high noise floor.What is a suggested best practice to deal with this scenario? - ANSWER-D. Plan for coverage cells with a 5 dB fade margin.
Which value should not be used to compare wireless network cards manufactured by different WLAN vendors? - ANSWER-D. RSSI
- / 4
- | P a g e
Which of the following devices produce active gain? (Choose all that apply.) - ANSWER-A. RF transceiver C. RF amplifier
The azimuth chart represents a view of an antenna's radiation pattern from which direction? - ANSWER-A. Top
What is the definition of the horizontal beamwidth of an antenna? - ANSWER-C. The distance between the two -3 dB power points on the horizontal axis, measured in degrees.
Which antennas are highly directional? (Choose all that apply.) - ANSWER-D. Parabolic dish E. Grid
Semidirectional antennas are often used for which of the following purposes? (Choose all that apply.) - ANSWER-A. Providing short- distance point-to-point communications C. Providing unidirectional coverage from an access point to clients in an indoor environment D.Reducing reflections and the negative effects of multipath
The Fresnel zone should not be blocked by more than what percentage to maintain a reliable communications link? - ANSWER-B. 40 percent
The size of the Fresnel zone is controlled by what factors? (Choose all that apply.) - ANSWER-C. Distance D. Frequency
- / 4