Online Access Free PW0-205 Exam Questions

An 802.11b client station does not receive an acknowledgement for a data frame that it attempted to transmit to another station on the network. In this case, what happens to the wireless client station DCF contention window?

• A.The slot time within the contention window decreases by 50%.
• B.The contention window approximately doubles in size.
• C.The contention window is immediately closed, and the frame is retransmitted.
• D.It varies because the backoff algorithm is random.
• E.The contention window is not affected by failed Data frame deliveries.

Choose the true statements regarding wireless network discovery processes for an
802.11b network.

• A.Client stations may continually send Probe Request frames on all 802.11b channels in the 2.4 GHz ISM band in a consecutive manner, regardless of their association state.
• B.Access points send Beacon Management frames only on the 802.11b channel in the 2.4 GHz ISM band for which the access point is configured.
• C.Client stations send Probe Request frames on all 802.11b channels in the 2.4 GHz ISM band in a consecutive manner until they receive at least 3 Probe Response frames.
• D.Client stations send Probe Request frames on all 802.11b channels in the 2.4 GHz ISM band in a consecutive manner until they associate with an access point. After associating to an access point, they are no longer allowed to transmit Probe Request frames.
• E.Access points send Beacon Management frames on all 802.11b channels in the 2.4 GHz ISM band in a consecutive manner including the channel for which the access point is configured.

A process called preauthentication is specified by the 802.11 standard. Preauthentication is implemented by many vendors, and involves a client station performing what tasks?

• A.Authenticating with an Independent Basic Service Set and an Extended Service Set simultaneously.
• B.Reauthenticating with an Extended Service Set in approximately half of the time required by the association.
• C.Reassociating to the Extended Service Set through another access point just before it drops its connection with the existing access point.
• D.Associating to multiple Basic Service Sets simultaneously.
• E.Authenticating to additional Basic Service Sets while maintaining an association to only one access point at a time.

When an 802.11i-compliant wireless LAN security solution is being used with IPSec/ESP, what will a wireless LAN protocol analyzer see as the security mechanism in use?

• A.Both WEP and IPSec/ESP
• B.Unknown protocol
• C.IPSec/ESP
• D.TKIP or CCMP

While at a government-operated facility, you are attempting to troubleshoot a wireless LAN performance problem using a wireless protocol analyzer. When you start capturing frames, you see a proprietary layer 2 protocol running over the 802.11g network as shown in this screenshot. The facility's wireless LAN administrator confirms that this protocol is proprietary and used for both data encryption and compression. How will this affect the steps you take to troubleshoot performance problems on this wireless LAN?

• A.The proprietary encryption protocol will have no effect on your troubleshooting steps because the wireless LAN analyzer can still decode the PLCP and MAC headers of Data frames. This situation is essentially no different than troubleshooting a wireless LAN that uses WEP.
• B.As long as you load the proprietary client software onto your analyzer computer, you will be able to see all of the Data frames fully decoded. Doing this will allow you to troubleshoot the wireless LAN as though no encryption were in use.
• C.Troubleshooting will be hindered, but not eliminated 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.
• D.In order to troubleshoot performance problems on a network using a proprietary encryption protocol, you must use a wireless protocol analyzer that has integrated support for the protocol in use.