Certified Wireless Technology Specialist - Sales v6.0
Question 1
Which Wi-Fi technology simultaneously uses multiple radio chains to transmit or receive data?
- A. High Rate Direct Sequencing Spread Spectrum (HR/DSSS)
- B. Orthogonal Frequency Division Multiplexing (OFDM)
- C. Extended Rate Physical (ERP)
- D. Multiple Input, Multiple Output (MIMO)
Answer : D
Question 2
What type of protection does a lightning arrestor provide to a Wi-Fi system?
- A. Protection from direct lightning strikes
- B. Prevention of direct lightning strikes
- C. Redirection of transient current due to nearby lightning strikes
- D. Absorption of the energy induced by direct lightning strikes
Answer : C
Question 3
What two factors are used to calculate the wavelength of an RF wave? (Choose 2)
- A. Frequency
- B. Speed of light
- C. Amplitude
- D. Phase
Answer : AB
Question 4
The Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol is necessary in Wi-Fi networks because ___________.
- A. RF transmissions can be captured and decrypted without CSMA/CA.
- B. Wi-Fi clients need a standardized method of conserving battery power.
- C. 802.11g and 802.11b transceivers need an interpreter for compatibility.
- D. The wireless transmission medium is half-duplex, thus shared by all users.
- E. Wireless data must be converted to a format that is compatible with Ethernet networks.
Answer : D
Question 5
What unit of measurement is used to measure the power difference between two RF signals?
- A. Joule
- B. Decibel
- C. Ohm
- D. Volt
- E. Ampere
Answer : B
Question 6
What is used as a relative measurement of signal strength at the receiving client on an
802.11 wireless LAN?
- A. Watt
- B. dBm
- C. RSSI
- D. Milliwatt
Answer : C
Question 7
Exhibit:
In what type of Wi-Fi deployment is an antenna mounted using a pole mounting kit, as shown in the exhibit?
- A. Indoor Mesh
- B. Outdoor Bridging
- C. Office space APs
- D. Hotel guest access
Answer : B
Question 8
Simple antenna diversity mitigates the adverse effects caused by which common Wi-Fi problem?
- A. Hidden node
- B. RF signal absorption
- C. Multipath
- D. Co-channel interference
- E. Polarization
Answer : C
Question 9
Which statement best defines SNR?
- A. The difference between the noise floor and a signal's strength
- B. The technology used to detect objects using RF waves
- C. The absolute measurement of signal strength at the receiver
- D. The frequency of the RF signal compared to that of an interferer
Answer : A
Question 10
802.11a operates in the __________ GHz frequency range and uses the ___________ frequency bands.
- A. 2.4, OFDM
- B. 2.4, ERP
- C. 2.4, HR/DSSS
- D. 5, OFDM
- E. 5, UNII
Answer : E
Question 11
ABC Academy is currently using non-802.11 2.4 GHz wireless security cameras. What problem will ABC Academy experience if they deploy Wi-Fi client devices in the 2.4 GHz
ISM band?
A. The Wi-Fi client devices will experience performance degradation due to co-channel interference.
B. Wi-Fi client devices will create a security hole in the Wi-Fi infrastructure as a protection mechanism.
C. If the Wi-Fi client devices detect the security cameras, they will move to the 5 GHz band and stop transmitting in the 2.4 GHz band.
D. The Wireless Network Management System (WNMS) would not be able to manage the
APs near the security cameras.
Answer : A Topic 4, Site Surveying and Installation
Question 12
In preparation for site surveys, your company is creating a questionnaire that will help you understand your customer's client connectivity requirements. What question is NOT appropriate for your company's pre-survey questionnaire?
- A. What applications will be used by Wi-Fi client devices on the wireless network?
- B. How will Power over Ethernet (PoE) be supplied to Wi-Fi client devices?
- C. How many concurrent Wi-Fi client connections are expected on the wireless network?
- D. What types of Wi-Fi client devices will be connected to the wireless network?
- E. What 802.11 physical technology (PHY) will be used by the Wi-Fi client devices?
Answer : B
Question 13
A software-based site survey tool sold by your company allows your customers to determine access point coverage and optimum placement within a facility without visiting the facility.
What is the term that most accurately describes this type of site survey?
- A. Graphical Assessment
- B. Automated Calibration
- C. Dynamic Virtualization
- D. Predictive Modeling
Answer : D
Question 14
Which scenario represents an improper installation for an AP with low-gain omnidirectional antennas?
- A. Placed above the doorway, at one end of a long hallway
- B. Placed on the ceiling, near the center of a meeting room
- C. Mounted near the middle of a small branch office
- D. Placed on a centrally-located desk in a small office
Answer : A
Question 15
What tool is best suited for locating and identifying sources of RF interference, such as microwave ovens?
- A. Spectrum analyzer
- B. Wi-Fi client utilities
- C. Wireless protocol analyzer
- D. Predictive analysis software
- E. High-gain omni antenna
Answer : A