最新的CWAP PW0-270免費考試真題

問題1

Many access points support IEEE 802.1Q VLAN tagging. When analyzing a WLAN system using IEEE 802.1Q tags, where can the VLAN tag number be seen?

A. In the Ethernet header on the wired port of the access point

B. In the Beacon Management frame's Capabilities fixed field

C. In the PLCP header's Service field

D. In the Sequence Control field of the MSDU

E. In the Frame Control field of the MPDU header

正確答案: A

問題2

In which 802.11 frames is the SSID present, provided the SSID is not removed through proprietary software configuration by an administrator? (Choose 3)

A. Disassociation

B. Association Response

C. Probe Response

D. Authentication

E. Association Request

F. Reassociation Request

正確答案: C,E,F

問題3

What MAC layer information will a dual-band 802.11n protocol analyzer capture if it is capturing data frames encrypted with WPA2-Enterprise? (Choose 2)

A. Source IP Address

B. Short Interframe Spaces

C. Null Data frames

D. Sequence Control fields

E. Legacy Signal field

F. TCP SYN datagram

正確答案: C,D

問題4

While at a government-operated facility, you are attempting to troubleshoot a WLAN performance problem using a wireless protocol analyzer. When you start capturing frames, you see a proprietary layer 2 protocol running over the ERP network as shown in this screenshot. The facility's WLAN administrator confirms that this protocol is proprietary and used for both data encryption and compression.

How will this information affect the steps you take to troubleshoot performance problems on this WLAN?

A. The proprietary encryption protocol will have no effect on your troubleshooting steps because the wireless protocol analyzer can still decode the PLCP and MAC headers of Data frames. This situation is essentially no different than troubleshooting a WLAN that uses WPA2-Personal.

B. In order to troubleshoot performance problems on a network using proprietary encryption protocols like this one, you must use a wireless protocol analyzer that has integrated support for the protocol in use.

C. As long as you load the proprietary software codec onto your analyzer computer, you will be able to see all of the Data frame information fully decoded. Loading the proprietary software codec will allow you to troubleshoot the WLAN as though no encryption were in use.

D. Troubleshooting will be somewhat limited because only part of the information needed for performance measurements by the analyzer is encrypted. Each Data frame's MAC header will be encrypted, but the PLCP header can still be decoded successfully.

正確答案: A

問題5

What is the purpose of a PHY preamble?

A. It communicates important information about the PSDU's length, rate, and upper layer protocol-related parameters.

B. It provides a cyclic redundancy check (CRC) for the receiving station to validate that the PLCP header was received correctly.

C. It provides the receiver(s) with an opportunity for RF channel synchronization prior to the start of the PLCP header.

D. It indicates to the PHY the modulation that shall be used for transmission (and reception) of the PSDU.

正確答案: C

問題6

Your wireless network troubleshooting kit includes an antenna with the following specifications:
Gain: 5 dBi
Azimuth Beamwidth: 55 degrees
Elevation Beamwidth: 50 degrees
Frequency Range: 2.4 - 2.5 GHz and 4.9 - 5.9 GHz
Polarization: Linear
Impedance: 50 Ohms
For what aspect of network troubleshooting would this antenna be most useful?

A. Finding the physical location of an interfering transmitter to identify and remove the source

B. Matching transmit and receive capabilities for most client stations to reproduce client reception issues

C. Increasing resolution bandwidth (RBW) on a spectrum analyzer to improve signature identification features

D. Identifying problems with Fresnel zone clearance in long range (10+ miles / 16+ km) point-topoint links

E. Capturing BSS-wide CRC error and retry statistics in most indoor WLAN environments

正確答案: A

最新的CWAP Certified Wireless Analysis Professional - PW0-270免費考試真題

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