PW0-270 試験問題を無料オンラインアクセス

Given: Shown are frames captured from an IEEE 802.1X/LEAP authentication. This WLAN is a Robust Security Network (RSN) using the CCMP cipher suite.

Using the information given in the screenshot, calculate how long it takes for only the frames that are part of the 4-Way handshake to complete.

• A.210.443 ms
• B.243.743 ms
• C.237.753 ms
• D.3.018 ms
• E.5.820 ms

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.Matching transmit and receive capabilities for most client stations to reproduce client reception issues
• B.Increasing resolution bandwidth (RBW) on a spectrum analyzer to improve signature identification features
• C.Identifying problems with Fresnel zone clearance in long range (10+ miles / 16+ km) point-topoint links
• D.Capturing BSS-wide CRC error and retry statistics in most indoor WLAN environments
• E.Finding the physical location of an interfering transmitter to identify and remove the source

Which statements regarding an IEEE 802.11 Channel Switch Announcement frame are true? (Choose 2)

• A.Channel Switch Announcement elements may be carried in Beacon management frames.
• B.In an infrastructure BSS, Channel Switch Announcement frames may be transmitted by either the AP or an associated STA.
• C.Channel Switch Announcement frames are transmitted and retransmitted on a channel until all associated STAs successfully move to the new channel.
• D.Channel Switch Announcement frames use the Action frame body format.
• E.Channel Switch Announcement frames are the only place where the Channel Switch Announcement element is found.

Shown is a screenshot of a wireless protocol analyzer displaying the decode information for a single 802.11 encrypted data + CF-Poll frame. The infrastructure BSS on which this information was captured is using WEP and this particular frame was sent from a client station (STA) to an access point (AP).

As a protocol analyst, how would you explain the existence of this frame on the wireless medium given the information in the decode?

• A.The access point is operating as a repeater, and clients must poll repeater access points in order to transmit data frames through them.
• B.The frame was sent by a client station that does not comply with IEEE HR/DSSS standard to an access point that is Wi-Fi certified.
• C.The IEEE 802.11 network is using both version 1 and version 2 protocols simultaneously. This unexpected frame is from the version 2 protocol set.
• D.The frame was misinterpreted because of insufficient information received by the analyzer due to frame corruption.

ABC Company's WLAN administrator is getting complaints from one user that his WLAN throughput is sluggish compared to other users in his area. The administrator takes his diagnostics laptop, which has a wireless protocol analyzer installed, to the area where the complaining user works. The administrator uses the PING utility to test connectivity from the complaining user's wireless client station to another wireless client station across the closest access point, while capturing the wireless frames. The administrator sees what is displayed in this screenshot.

From this screenshot, which statements can you conclude to be TRUE that are related to the complaining user's throughput problem? (Choose 2)

• A.The access point and other stations are using ERP-OFDM modulation, and the complaining user's wireless client station is using HR/DSSS modulation.
• B.The complaining user's WLAN client utilities are configured with a small fragmentation threshold.
• C.The complaining user's station is retransmitting fragments many times likely due to nearby RF interference.
• D.The complaining user's wireless client station should be using RTS/CTS as a protection mechanism, but it is not.
• E.The access point is not signaling for protection (Protection = no) in the Beacons, but it should be.