최신 CWNP Wireless LAN Certifications PW0-205 무료샘플문제:

1. In the graphic, there are three active 802.11b access points. These access points are on channels 1, 6, and 11. In the graph to the left, signals on channels 1, 6, and 11 are shown in green bars above their channel number. What do the brown bars on channels 2, 3, 5, 7,
10, and 12 represent?

A) Channel harmonics (resonant frequencies)
B) Cross channel interference
C) Unassociated stations sending probe request frames trying to locate an access point with which to associate
D) Transmissions on adjacent channels by DSSS access points that are not part of this wireless LAN system
E) Stations associated to the channel 1, 6, & 11 access points
F) Transmission echoes (multipath)

2. In the analyzer trace shown, the TBTT is nominally 100 Kilomicroseconds. Why does the difference between the time Beacons are sent vary?

A) This trace is taken of an 802.11b/g mixed mode network where both 802.11b and
802.11g nodes are active on the network. The access point is changing slot times from short to long as needed.
B) The access point must compete to gain access to the RF medium in order to transmit a beacon.
C) Beacon frames vary in size, and therefore some take slightly longer to send than others.
D) The DCF Interframe space is nominally 50 , but typically varies by as much as 10 (?0%) causing delays in beacons.

3. The More Fragments subfield is found in which 802.11 frame field?

A) Frame Control field
B) Protocol Order field
C) MAC Service Data Unit field
D) Fragmentation Control field
E) Sequence Control field

4. What is indicated when the ToDS and FromDS bits are set to 1 in the Frame Control field?

A) The frame is being transmitted from one wireless client station to another wireless station within the same BSS
B) The frame is being transmitted from a wireless client station to an access point where the frame terminates at the access point.
C) The frame is being transmitted from a wireless client station to a wired station.
D) The frame is being transmitted from a wired station to a wireless client station.
E) The frame is being transmitted between two access points over a wireless distribution system.

5. In the 802.11b standard, the PLCP header Service field has a Modulation Selection bit.
Which of the following are true regarding use of the Modulation Selection bit?

A) Based on the Modulation Selection bit in received Data frames, the receiving station can determine which modulation to use when sending acknowledgements.
B) Based on the setting of the Modulation Selection bit and the value in the Signal field, the modulation to be used can be uniquely determined.
C) The Modulation Selection bit is used by the access point in CF-End frames to note which modulation will be used for Data frames in the contention period to follow.
D) The Modulation Selection bit is used to determine which modulation will be used to send the entire PPDU.
E) The Modulation Selection bit is used to determine whether CCK or PBCC is in use for any speed where either could be used.

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