Free CWNP PW0-205 Exam Dumps Questions & Answers

There are many wireless LAN scanners on the market such as NetStumbler, Kismet, MacStumbler, and others that can aid in finding the SSID of wireless LANs. In order to defeat the efforts of these scanners, some administrators configure their access points to stop broadcasting SSIDs in Beacons and not to respond to Probes with null (empty) SSID fields. Describe how wireless LAN protocol analyzers can circumvent this so-called
"security" solution.

• A.  Wireless LAN protocol analyzer software puts the radio card driver into RF Monitor mode. This mode is recognized by access points as privileged, allowing them connectivity when it would otherwise be denied.
• B.  Wireless LAN protocol analyzers using cards from the same manufacturer as the access point will always be able receive the SSID due to the proprietary chipset protocol extensions.
• C.  Wireless LAN protocol analyzers analyze all frames on a wireless LAN. Frame types other than Beacons and Probe Responses carry the SSID information.
• D.  Wireless LAN protocol analyzers send specialized Probe Requests to which 802.11 compliant access points are required to respond with a Probe Response containing the SSID information.
• E.  Wireless LAN protocol analyzers use a special driver, used to operate the card in promiscuous mode. Promiscuous mode is a special mode allowing the radio card to see raw data frames, instead of the filtered data frames that standard mode radio cards see.

In the 802.11 series of wireless LAN standards, there is a medium access rule regarding formatting of preambles in response to MMPDUs. What does this rule state?

• A.  The rule states that only short preambles may be used in response-MMPDUs regardless of any other factor.
• B.  The rule states that only long preambles may be used in response-MMPDUs regardless of any other factor.
• C.  The rule states that a response-MMPDU must be sent with the same type of preamble as the request-MMPDU that triggered the response-MMPDU.
• D.  The rule states that if a mixed set of stations (long/short preamble settings) are associated to the access point, only long preambles may be used for response-MMPDUs.
• E.  The rule states that short preambles should be used in response-MMPDUs until a single station associates to the BSS using the long-preamble format, after which, only long preambles are used.

In an 802.11 wireless LAN frame with either long or short preambles, the PLCP Header consists of multiple fields. Which of the following are valid PLCP Header fields?

• A.  FCS
• B.  MSDU
• C.  Signal
• D.  SFD
• E.  Sync

Given the frame capture and the decode shown, after which beacons in the list shown (as referenced by the frame number in the leftmost column) would multicast traffic have been sent in this infrastructure BSS if multicast traffic had been present?

• A.  frame number 50B.frame number 50B.frame number 50
• B.  frame number 53D.frame number 53D.frame number 53
• C.  frame number 54E.frame number 54E.frame number 54
• D.  frame number 49A.frame number 49A.frame number 49
• E.  frame number 57G.frame number 57G.frame number 57
• F.  frame number 51C.frame number 51C.frame number 51
• G.  frame number 55F.frame number 55F.frame number 55

Referencing the screenshot of an 802.11b Data frame, what does the "Version" field mean?

• A.  Version = 0 shows whether 802.1h or RFC1042 frame translation is being used between the wired and wireless sides of the access point.
• B.  Version = 0 shows which type of fragmentation is being used on the wireless segment.
  It can be either standard or compressed.
• C.  Version = 0 shows that the first revision of the 802.11 frame format is in use.
• D.  Version = 0 shows which version of 802.11 MAC header is in use. It can be either Standard or SNAP.