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質問 1：
You are reporting on the RF environment in your facility. The manager asks you to describe the noise floor noted in the report. Which of the following is the best explanation?
A. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.
B. The noise caused by elevators, microwave ovens, and video transmitters.
C. The extra energy radiated by access points and client devices beyond that intended for the signal.
D. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?
A. Overlay WLAN monitoring solution
B. Laptop-based spectrum analyzers
C. AP-based spectrum analysis
D. Laptop-based protocol analyzers
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
You administer a small WLAN with nine access point. As a small business, you do not rum a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-personal in all Aps and clients. Several users are now reporting the inability to connect to the network at time and it is constrained to one area of the building. When using scanner, you see that the AP covering that area is online
A. The clients are improperly configured
B. The AP that covers the problem area is improperly configured
C. The AP that covers the problem area has failed
D. The AP that covers the problem area requires a firmware update
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 4：
A POE device requires 47 W of power. What POE specification should be used?
A. 802. 11at
B. 802.3bt
C. 802.3at
D. 802.3af
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
You are a small business wireless network consultant and provide WLAN services for various companies. You receive a call from one of your customers stating that their laptop computers suddenly started experiencing much slower data transfers while connected to the WLAN. This company is located in a multi-tenant office building and the WLAN was designed to support laptops, tablets and mobile phones. What could cause a sudden change in performance for the laptop computers?
A. A new tenant in the building has set their AP to the same RF channel that your customer is using.
B. The sky was not as cloudy that day as it typically is and the sun also radiates electromagnetic waves.
C. A few of your customer's users have Bluetooth enabled wireless headsets.
D. The antennas in the laptops have been repositioned.
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?
A. 2.413
B. 2.417
C. 2.422
D. 2.427
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
You are reporting on the RF environment in your facility. The manager asks you to describe the noise floor noted in the report. Which of the following is the best explanation?
A. The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.
B. The noise caused by elevators, microwave ovens, and video transmitters.
C. The extra energy radiated by access points and client devices beyond that intended for the signal.
D. The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the intentional signal of your WLAN must exist.
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
Your manager asked you to locate a solution that allows for centralized monitoring of WLAN performance over time. He wants a single pane of glass for administration and monitoring of the solution. What do you recommend?
A. Overlay WLAN monitoring solution
B. Laptop-based spectrum analyzers
C. AP-based spectrum analysis
D. Laptop-based protocol analyzers
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
You administer a small WLAN with nine access point. As a small business, you do not rum a RADIUS server and use WPA2-Personal for security. Recently, you changed the passphrase for WPA2-personal in all Aps and clients. Several users are now reporting the inability to connect to the network at time and it is constrained to one area of the building. When using scanner, you see that the AP covering that area is online
A. The clients are improperly configured
B. The AP that covers the problem area is improperly configured
C. The AP that covers the problem area has failed
D. The AP that covers the problem area requires a firmware update
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 4：
A POE device requires 47 W of power. What POE specification should be used?
A. 802. 11at
B. 802.3bt
C. 802.3at
D. 802.3af
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
You are a small business wireless network consultant and provide WLAN services for various companies. You receive a call from one of your customers stating that their laptop computers suddenly started experiencing much slower data transfers while connected to the WLAN. This company is located in a multi-tenant office building and the WLAN was designed to support laptops, tablets and mobile phones. What could cause a sudden change in performance for the laptop computers?
A. A new tenant in the building has set their AP to the same RF channel that your customer is using.
B. The sky was not as cloudy that day as it typically is and the sun also radiates electromagnetic waves.
C. A few of your customer's users have Bluetooth enabled wireless headsets.
D. The antennas in the laptops have been repositioned.
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
The center frequency of channel 1 in the 2.4 GHz band is 2.412 GHz (2412 MHz). What is the center frequency of channel 4?
A. 2.413
B. 2.417
C. 2.422
D. 2.427
正解：D
解説: (Pass4Test メンバーにのみ表示されます)
水嶋** -
力作だと思いますので、使い込みたいと思います。解説が丁寧で分かりやすいのでしっかりと頭に入ってきます。