Online Access Free CWAP-404 Practice Test

Using the exhibit as a reference, answer the following.

STA1 sent a data frame to Mesh AP2 destined for a local file server on the same subnet with MAC address 00:11:22:33:44:55. Mesh AP2's mesh forwarding algorithm determined that the frame should be forwarded through Mesh AP1.
In the frame sent from Mesh AP2 to Mesh AP1, what is true of the contents of the MAC header?
(Choose 3)

• A.SA = Mesh AP2's MAC Address
• B.TA = STA1's MAC Address
• C.DA = 00:11:22:33:44:55
• D.From DS = 1
• E.To DS = 0
• F.RA = Mesh AP1's MAC Address

Which parameters accurately describe the Beacon Interval field in the Beacon frame? (Choose 2)

• A.Indicates the exact time interval between Beacon transmissions
• B.4-octet length
• C.Measured in time units of 1024 ms
• D.Value can range from 0 to 2007
• E.Indicates the desired time interval between TBTTs

In the analyzer trace shown, the TBTT is nominally 102.5 milliseconds.

Why does the Beacon transmission interval vary?

• A.The access point must arbitrate to gain access to the RF medium in order to transmit a Beacon.
• B.Beacon frames vary in size, and therefore some take slightly longer to send than others.
• C.This trace shows an HT network where HR/DSSS nodes are active on the network. The access point is changing slot times from short to long as needed.
• D.The DCF Interframe space (DIFS) is nominally 50 ms, but typically varies by as much as 10 ms, which causes delays in Beacons.

Which statements accurately describe IEEE 802.11 EDCA collision handling in a WMM-compliant infrastructure WLAN? (Choose 2)

• A.After frames collide within a QoS STA and the lower priority AC subsequently gains a TXOP, the retry bit in the MAC header must be set to 1 to indicate a retry.
• B.Collisions between contending EDCAFs within a QoS STA are resolved within the QoS STA
• C.When frames collide within a QoS STA, data frames from lower priority ACs behave (as it relates to contention) as if there were an external collision on the wireless medium.
• D.When a frame transmission on the wireless medium fails, the transmitter may not transmit another frame from any AC or to any destination until the frame experiencing a failure is successfully transmitted or the max retry count for that frame is reached.
• E.The WMM specification requires use of RTS/CTS as part of the EDCAF within each QoS STA to avoid internal collisions between ACs.

You have captured 802.11 traffic using an adapter that includes the radio tap header. You see several frames often called announcement frames in the capture.
What best describes these types of frames?

• A.They are used to allow a STA to awake from sleep and for no other reason
• B.They only include beacon and probe request frames
• C.They are meant to provide information to the network that may result in state changes, but they are not open for rejection
• D.They only include beacon and probe response frames