CWNA-109試験無料問題集（124題）「CWNP Wireless Network Administrator (CWNA) 認定」

出題：1

You are attempting to explain RF shadow and how it can cause lack of coverage. What common building item frequently causes RF shadow and must be accounted for in coverage plans?

A. Cubicle partitions

B. Elevators

C. Carpeted floors

D. Wooden doors

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：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. Frequency band in use

B. guard interval

C. client drivers

D. Antenna Height

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：3

An 802.11-based network uses an AP and has several connecting clients. The clients include iPhones, iPads, laptops and one desktop. What WLAN use case is represented?

A. WPAN

B. Ad-hoc

C. IBSS

D. BSS

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：4

You are troubleshooting a problem with a new 802.11ax AP. While the AP supports four spatial streams, most clients are only achieving maximum data rates of 150 Mbps. What is the likely cause?

A. Non-Wi-Fi interference in the channel

B. Contention caused by an overlapping BSS

C. The clients are only two stream 802.11ax clients

D. The clients are 802.11n devices

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：5

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. No, because CCI only occurs in the 5 GHz frequency band.

B. Yes, because channel 11 loops around and causes CCI with channel 1.

C. No, because the APs are far enough apart that no CCI will occur.

D. 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.

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：6

When compared with legacy Power Save mode, how does VHT TXOP power save improve battery life for devices on a WLAN?

A. VHT TXOP power save allows the WLAN transceiver to disable more components when in a low power state.

B. VHT TXOP power save uses the partial AID in the preamble to allow clients to identify frames targeted for them.

C. Legacy Power Save mode was removed in the 802.11ac amendment.

D. VHT TXOP power save allows stations to enter sleep mode and legacy Power Save does not.

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：7

Which IEEE 802.11 physical layer (PHY) specification includes support for and compatibility with both ERP and HR/DSSS?

A. VHT (802.11ac)

B. HT (802.11n)

C. DSSS (802.11-Prime)

D. OFDM (802.11a)

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：8

What statement is true concerning the use of Orthogonal Frequency Division Multiplexing (OFDM) modulation method in IEEE 802.11 WLANs?

A. OFDM modulation is used only in 5 GHz 802.11 transmissions.

B. OFDM was first introduced in 802.11a and is used by the ERP, HT and VHT PHYs as well.

C. OFDM implements BPSK modulation to allow for data rates up to 7 Gbps.

D. OFDM was used by Frequency Hopping Spread Spectrum (FHSS) PHY devices.

正解：B 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：9

You are managing a wireless access point in autonomous mode using the Web based interface. You capture traffic during this management task and notice that you can see the HTML code of the Web pages used for access point management. What error in administration could be the cause of this security concern?

A. A VPN with the AP is not established

B. IPsec is not in use of the management connection as recommended

C. WPA2 is disabled on the WLAN

D. HTTP is in use instead of HTTPS

正解：D 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

出題：10

During a post-implementation survey, you have detected a non-802.11 wireless device transmitting in the area used by handheld 802.11g scanners. What is the most important factor in determining the impact of this non-802.11 device?

A. Airtime utilization

B. Protocols utilized

C. Channel occupied

D. Receive sensitivity

正解：A 解答を投票する

解説: (GoShiken メンバーにのみ表示されます)

CWNA-109試験無料問題集「CWNP Wireless Network Administrator (CWNA) 認定」