10 お客様のコメント
質問 1：
You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme. What do you tell the customer?
A. The clients that must support OFDMA must also be upgraded to 802.11ax
B. OFDMA is an optional feature of 802.11ax and most APs don't even support it
C. All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz
D. If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
When considering data rates available in HT and VHT PHY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?
A. client drivers
B. guard interval
C. Frequency band in use
D. Antenna Height
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
You are installing an AP to be used by 27 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?
A. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision
B. Channel 1, because it is best to use the channel with the lowest frequency
C. Channel 6, because it is always best to use this channel
D. Channel 11, because channels 1 and 6 are in use nearby
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 4：
An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?
A. It has 4 radio chains
B. It uses a modified OpenWRT firmware
C. It supports UL-MU-MIMO
D. It supports four channels in 2.4 GHz and 4 channels in 5 GHz
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
A. 1 and 5
B. 4 and 6
C. 7 and 11
D. 2 and 8
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
Lynne runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot.
Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?
A. Enable station-to-station traffic blocking by the access points in the hotel.
B. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
C. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
D. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 7：
Three access points are used within a facility. One access point is on channel 11 and the other two are on channel 1. The two access points using channel 1 are on either side of the access point using channel 11 and sufficiently apart so that they do not interfere with each other when they transmit frames. Assuming no other APs are in the vicinity, is CCI still a possibility in this network and why?
A. Yes, because channel 11 loops around and causes CCI with channel 1.
B. No, because the APs are far enough apart that no CCI will occur.
C. Yes, because the client devices connected to one of the channel 1 APs will transmit frames that reach the other channel 1 AP as well as clients connected to the other channel 1 AP.
D. No, because CCI only occurs in the 5 GHz frequency band.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
You have implemented an 802.11ax WLAN for a customer. All APs are four stream HE APs. The customer states that it is essential that most of the clients can use the OFDMA modulation scheme. What do you tell the customer?
A. The clients that must support OFDMA must also be upgraded to 802.11ax
B. OFDMA is an optional feature of 802.11ax and most APs don't even support it
C. All 5 GHz PHYs use OFDM modulation, so you will achieve OFDMA everywhere in 5 GHz
D. If the devices support 802.11ac, they can be updated to support OFDMA through driver upgrades
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 2：
When considering data rates available in HT and VHT PHY devices, in addition to the modulation, coding, channel width, and spatial streams, what impacts the data rate according to the MCS tables?
A. client drivers
B. guard interval
C. Frequency band in use
D. Antenna Height
正解：B
解説: (Pass4Test メンバーにのみ表示されます)
質問 3：
You are installing an AP to be used by 27 laptops. All laptops will connect on the 5 GHz frequency band. A neighbor network uses channels 1 and 6. What channel should be used for this AP and why?
A. A 5 GHz channel, because channels 1 and 6 are 2.4 GHz channels they have no impact on the decision
B. Channel 1, because it is best to use the channel with the lowest frequency
C. Channel 6, because it is always best to use this channel
D. Channel 11, because channels 1 and 6 are in use nearby
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 4：
An AP is advertised as a tri-band, 4x4:4, Wi-Fi 6, 802. 11ax AP. Based on this information and assuming it is correctly advertised, what can be determined as certainly true about this AP?
A. It has 4 radio chains
B. It uses a modified OpenWRT firmware
C. It supports UL-MU-MIMO
D. It supports four channels in 2.4 GHz and 4 channels in 5 GHz
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 5：
In an 802.11 2.4 GHz system, what 22 MHz channels are considered non-overlapping?
A. 1 and 5
B. 4 and 6
C. 7 and 11
D. 2 and 8
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 6：
Lynne runs a small hotel, and as a value added service for his customers he has implemented a Wi-Fi hot-spot.
Lynne has read news articles about how hackers wait at hot-spots trying to take advantage of unsuspecting users. He wants to avoid this problem at his hotel.
What is an efficient and practical step that Lynne can take to decrease the likelihood of active attacks on his customers' wireless computers?
A. Enable station-to-station traffic blocking by the access points in the hotel.
B. Require EAP-FAST authentication and provide customers with a username/password on their receipt.
C. Implement Network Access Control (NAC) and require antivirus and firewall software along with OS patches.
D. Implement an SSL VPN in the WLAN controller that initiates after HTTPS login.
正解：A
解説: (Pass4Test メンバーにのみ表示されます)
質問 7：
Three access points are used within a facility. One access point is on channel 11 and the other two are on channel 1. The two access points using channel 1 are on either side of the access point using channel 11 and sufficiently apart so that they do not interfere with each other when they transmit frames. Assuming no other APs are in the vicinity, is CCI still a possibility in this network and why?
A. Yes, because channel 11 loops around and causes CCI with channel 1.
B. No, because the APs are far enough apart that no CCI will occur.
C. Yes, because the client devices connected to one of the channel 1 APs will transmit frames that reach the other channel 1 AP as well as clients connected to the other channel 1 AP.
D. No, because CCI only occurs in the 5 GHz frequency band.
正解：C
解説: (Pass4Test メンバーにのみ表示されます)
泉田** -
この問題集を購入して今回合格出来ました。
説明が非常に分かりやすく