최신 CWNA-106 무료덤프 - CWNP Certified Wireless Network Administrator

문제1

In an 802.11n 2.4 GHz BSS, what prevents each station fromusing the full network bandwidth (e.g. 130 Mbps) for user data throughput when multiple clients are actively exchanging data with the AP?

A. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic.

B. WLAN devices cannot detect collisions and must receive positive frame acknowledgment.

C. Radio receiver hardware cannot process data as quickly as it can be transmitted.

D. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections with 802.11n and earlier APs.

정답: B

문제2

What is the intended use for the WLAN hardware known as a pole or mast mount unit?

A. Mounting an access point to a site survey tripod

B. Mounting anomnidirectional antenna to a mast

C. Mounting an RF amplifier to a dipole antenna

D. Mounting a lightningarrestor to a grounding rod

E. Mounting a PoE injector to a perforated radome

정답: B

문제3

As you prepare for a site survey in a multi-floor corporate office, you have learned about several wireless devices that support connection-oriented, real-time applications. These applications are sensitive to service interruptions and require excellent signal quality, low latency, and low loss. For that reason, it is important to identify sources of RF interference as well as building characteristics that would cause RF blockage or dead spots.
What systems or environmental characteristics are most likely to cause interference or RF blockage and disrupt service for these applications? (Choose 2)

A. Workspace dividers

B. Narrow hallways

C. Elevator shafts

D. RFID chokepoints

E. Microwave ovens

정답: C,E

문제4

You are the network administrator for ABC Company. Your manager has recently attended a wireless security seminar. The seminar speaker taught that a wireless network could be hidden from potential intruders if you disabled the broadcasting of the SSID in Beacons and configured the access points not to respond to Probe Request frames that have a null SSID field.
Your manager suggests implementing these security practices. What response should you give to this suggestion? (Choose 2)

A. To improve security by hiding the SSID, the AP and client stations must both be configured to remove the SSID from association request and response frames. Most WLAN products support this.

B. Any tenants in the same building using advanced penetration testing tools will be able to obtain the SSID by exploiting WPA EAPOL-Key exchanges. This poses an additional risk of exposingthe WPA key.

C. Any 802.11 protocol analyzer can see the SSID in clear text inframes other than
Beacons and Probe Responseframes. This negates any security benefit of trying to hide the SSID in Beacons and Probe Response frames.

D. Although it does not benefit the security posture, hiding the SSID in Beacons and Probe
Response frames can be helpful for preventing some users (such as guests) from attempting to connect tothe corporate network.

E. This security practice prevents manufacturers' client utilities from detecting the SSID. As a result,the SSID cannot be obtained by attackers, except through social engineering, guessing, or use of a WIPS.

정답: C,D

문제5

ABC Hospital is planning a Wi-Fi infrastructure upgrade wherethe 802.11b/g APs
(HR/DSSS and ERP) would be replaced with new dual-radio 802.11n/802.11ac (HT and
VHT) APs. ABC wants to minimize the time and cost associated with performing a new site survey, so they will be mounting all of the new APs in the same locations and with the same cable drops as the existing APs.
What is one performance drawback with this deployment method?

A. The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT 802.11 PHY capabilities.

B. If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.

C. Increased receiver sensitivity on theVHT APs will cause them to continually change channels to avoid co-channel interference.

D. Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.

정답: A

문제6

In an infrastructure Basic Service Set (BSS), how does the passive scanning process occur?

A. Client stations broadcast Probe Request frames on all supportedchannels inthe regulatory domain. Nearby access points respond with Probe Response frames. Client stations record information in the Probe Response frames for use in the association process.

B. Client stations broadcast Probe Request frames on the singlechannel forwhich they are programmed. Nearby access points respond on that channel with Probe Response frames.
Client stations record information found in the Probe Response frames for use in the association process.

C. Access points broadcast Beacons on asingle channel for which they are programmed.
Nearby client stations listen for Beacon frames and record information found in the
Beacons for use in the association process.

D. Access pointsbroadcast Beacons on all channels of each radio within the regulatory domain. Nearby client stations record information found in the Beacons for use in the association process.

정답: C

문제7

When compared with legacyPower 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 powerstate.

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

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

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

정답: C

문제8

What statements about the SSID are true? (Choose 2)

A. The SSID must be included in an association request frame.

B. The SSID is an alphanumeric value with a maximum length of 32 octets.

C. The SSID is a pseudo-random number assigned to each client by an AP.

D. When configuring a new network, creating an SSID is optional.

E. The SSID is a security session identifierused in RSNs.

F. The SSID is an alphanumeric value assigned to device manufacturers by the IEEE.

정답: A,B

문제9

Why is it recommended for a wireless network administrator to disable 1 Mbps and 2 Mbps data rates on the WLANinfrastructure? (Choose 2)

A. To improve capacity in the BSS

B. To enable support for long preambles

C. Toprevent 802.11b devices from associating

D. To reduce the size of the AP's effective service area

E. To maximize the range of the highest data rates

F. To prevent VoWiFi multicast frames

정답: A,D

최신 CWNA-106 무료덤프 - CWNP Certified Wireless Network Administrator

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