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

質問 1

As an RF wave propagates through space, the wave front experiences natural expansion that reduces its signal strength in an area. What describes the rate at which this expansion happens?

（A）Ohm's law

（B）MU-MIMO

（C）Inverse square law

（D）Fresnel zone thinning

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 2

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

（A）Legacy Power Save mode was removed in the 802.11ac amendment.

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

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

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

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 3

XYZ Company has decided to install an 802.11 WLAN system that will support 1083 wireless users, but they are concerned about network security. XYZ is interested in deploying standardized security features. In addition to WPA2-Enterprise with PEAP and role-based access control, XYZ would like to support management frame protection as well as a fast secure roaming protocol for future mobile handsets.
As XYZ Company selects a product to deploy, what two IEEE amendments, which are included in
802.11-2016, and 802.11-2020 should be supported to provide the management frame protection and fast secure roaming security features?

（A）802.11r and 802.11w

（B）802.11j and 802.11k

（C）802.11j and 802.11z

（D）802.11k and 802.11v

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 4

ABC Company is planning to install a new 802.11ac WLAN, but wants to upgrade its wired infrastructure first to provide the best user experience possible. ABC Company has hired you to perform the RF site survey.
During the interview with the network manager, you are told that the new Ethernet edge switches will support VoIP phones and 802.11 access points, both using 802.3 PoE.
After hearing this information, what immediate concerns do you note?

（A）The power budget in the edge switches must be carefully planned and monitored based on the number of supported PoE devices.

（B）If the switches are in optimal locations for VoIP phones, they are likely to be suboptimal locations for
802.11 APs

（C）The edge Ethernet switches should support Ether-channel to get the best results out of the network.

（D）VoIP phones and 802.11 access points should not be powered by the same edge switch due to distortion.

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 5

A natural disaster has occurred in a remote area that is approximately 57 miles from the response team headquarters. The response team must implement a local wireless network using 802.11 WLAN access points.
What is the best method, of those listed, for implementation of a network back-haul for communications across the Internet in this scenario?

（A）Temporary wired DSL

（B）Cellular/LTE/5G

（C）802.11 bridging to the response team headquarters

（D）Turn up the output power of the WLAN at the response team headquarters

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 6

What feature of 802.1 lax (HE) may impact design decisions related to AP placement and the spacing between same-channel BSS cells (3SAs) because it is designed to reduce overlapping BSS contention?

（A）uplink MU-MIMO

（B）TWT

（C）6 GHz band support

（D）BSS Color

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 7

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 uses a modified OpenWRT firmware

（B）It supports UL-MU-MIMO

（C）It supports four channels in 2.4 GHz and 4 channels in 5 GHz

（D）It has 4 radio chains

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

You are evaluating access points for use in the 5 GHz frequency band. What PHY supports this band and supports 80 MHz channels?

（A）VHT

（B）OFDM

（C）ERP

（D）HT

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 9

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

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

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

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 10

What 802.11 network configuration would result in multiple stations broadcasting Beacon frames with the same BSSID but with different source addresses?

（A）Multiple APs have been loaded with the same configuration from an image file.

（B）A single AP supports multiple BSSs with different SSIDs.

（C）An SCA network is in use.

（D）An IBSS is used instead of a BSS.

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

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

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