CWNP PW0-205 : Certified wireless analusis professional(cwap)

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CWNP PW0-205 Exam Syllabus Topics:

CWNP Certified wireless analusis professional(cwap) Sample Questions:

1. Which is true of an 802.11 station use of the Power Management subfield in the Frame Control field?

A) This subfield must contain the same value for all frames transmitted by the station during a single frame exchange.
B) This subfield is only used by a station participating in an IBSS to announce to its peers its intention to power down.
C) This subfield is a 2 bit field that is used by a station to announce its power management mode to the access point.
D) A value of 11 in this subfield indicate that the station is in the active mode and will be available for future communication.

2. When using a protocol analyzer to capture conversations over a wireless LAN, you may often see that the traffic is encrypted. Most wireless LAN protocol analyzers have a feature that allows the analyst to save and reload the captured frames into memory at a later time.
Using this functionality, what tasks can be performed?

A) When 802.1X/EAP-MD5 is being used as the wireless LAN security mechanism, the authentication response frame can be replayed from a saved trace file at a later time to successfully authenticate a hacker.
B) An analyst can search through the captured frames looking for a RADIUS EAPoL frames that will disclose the user password.
C) Encrypted frames may be decrypted offline, after they are captured, by entering a WEP key or WPA-PSK passphrase into the analyzer.
D) If a user name and password for an 802.1X/EAP-TTLS security implementation can be obtained through social engineering tactics, the user name and password can be entered into the analyzer to decrypt the frames from a saved trace file.

3. According to the IEEE 802.11 standard, what is one structural difference between a MAC Protocol Data Unit (MPDU) and a MAC Management Protocol Data Unit (MMPDU)?

A) An MMPDU header may only contain three address fields, but an MPDU may have four address fields.
B) The MMPDU frame body is limited to 200 bytes, whereas the MPDU frame body can carry up to 2312 bytes.
C) The MPDU header always places the BSSID in the first address field, but in the MMPDU the BSSID can be found in any of the address fields.
D) The MPDU frame FCS field is 4 bytes, while the MMPDU frame FCS field is 8 bytes.

4. ABC Corp has just installed a single 802.11b access point into their medium-sized office environment. As the wireless LAN administrator at ABC Corp, you use a wireless protocol analyzer to troubleshoot the problem. You place your analyzer close to the access point, and capture some traffic from office users. Given the screenshot shown, which of the following statements offer the best explanation for the poor wireless LAN performance of ABC's new 802.11b wireless LAN?

A) There is likely a source of RF interference somewhere around the access point. This is causing many data frames to be retransmitted, so overall wireless LAN throughput has been greatly diminished.
B) Due to an 802.11g client joining the BSS, protection mechanisms have been enabled in the BSS by the access point. These protection mechanisms greatly increase protocol overhead, thereby decreasing overall wireless LAN throughput.
C) A nearby 802.11b access point is operating on an adjacent channel causing a significant amount of corrupt frames within ABC's BSS. These corrupt frame fragments are congesting the channel on which ABC's wireless LAN is operating, thereby decreasing its throughput.
D) One of the wireless LAN users has moved far enough away from the access point that his client station has begun transmitting frames at the minimum supported data rate. Even when a single user uses this rate for Data frames, throughput for the entire wireless LAN as a whole is slowed significantly.

5. XYZ Corporation has an 802.11b/g mixed mode deployment, and they are currently experiencing random throughput problems around the entire network. When the network was originally installed, there were both 802.11b and 802.11g stations on the network, but throughput levels were acceptable at any given time. To troubleshoot this issue, you have deployed a distributed wireless protocol analyzer, and it has noted a significantly greater percentage of 1 Mbps Data traffic being sent in random places across the network as compared with the initial baseline testing. When the network was installed, you considered only a minimal amount of 1 Mbps Data traffic acceptable. What could be causing this problem, and how would the analyzer know about the 1 Mbps traffic?

A) Due to changes in the office environment, some client stations are moving further away from the access points than when the baseline tests were performed. The analyzer views the SIGNAL field in the PLCP header to see the frames transmission rates.
B) A wireless network management system has updated all access points to allow only use of the long slot time. The analyzer views the SERVICE field in the PLCP header to see the frames?transmission rates.
C) A new 802.11g station has a minimum transmission rate set at 1 Mbps. The analyzer views the Start Frame Delimiter (SFD) field in the PLCP header to see the frames?transmission rates.
D) An access point configured for 802.11b/g mixed mode has been reconfigured to send downstream traffic in a round-robin fashion when protection is enabled. The analyzer views the length of the preamble to determine the transmission rate of associated stations.

Solutions: