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CWNP Certified wireless analusis professional(cwap) Sample Questions:

1. 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) The MMPDU frame body is limited to 200 bytes, whereas the MPDU frame body can carry up to 2312 bytes.
B) An MMPDU header may only contain three address fields, but an MPDU may have four address fields.
C) The MPDU frame FCS field is 4 bytes, while the MMPDU frame FCS field is 8 bytes.
D) 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.

2. In order to increase throughput in an IEEE 802.11b/g mixed mode environment where
802.11b and 802.11g stations are both actively participating in a BSS, the DSSS-OFDM modulation was introduced in the 802.11g supplement. How does DSSS-OFDM increase throughput in a mixed mode environment?

A) An OFDM preamble and payload are used along with a DSSS header and FCS.
B) A DSSS preamble is used along with an OFDM header, payload, and FCS.
C) A DSSS preamble and header are used along with an OFDM payload.
D) An OFDM preamble and header are used along with a DSSS payload.
E) An OFDM preamble is used along with a DSSS header and payload.
F) A DSSS preamble and payload are used, along with an OFDM header.

3. Some protocol analyzers have the ability to capture only MAC frame headers (sometimes called packet slicing), and others have the ability to update the capture display without saving the frames permanently (sometimes called stumbling mode). What are advantages of using these two features of a wireless protocol analyzer?

A) Analyzers can capture traffic on more channels simultaneously due to decreased overhead per channel.
B) Analyzers can use DRAM to store captured frames instead of storing files on a hard drive.
C) Analyzers with a small amount of frame buffer memory can be used.
D) Analyzers can be left running for long periods of time without running out of frame buffer space.
E) Capturing, analyzing, and discarding headers allows more CPU cycles for real-time decoding and analysis.

4. An 802.11b client station, sends a single 600 byte MSDU to another 802.11b client station while operating as part of an unsecured infrastructure BSS. Due to thresholds set on all client stations and the access point, all MPDUs over 300 bytes in length invoke the RTS/CTS protocol. How many individual CTS frames are transmitted on the wireless medium as part of the entire process of moving the 600 byte MSDU between the two client stations?

A) 2
B) 1
C) 4
D) 3

5. Which of the following must be true before an 802.11 station may transmit a frame on the RF medium using DCF mode?

A) The Network Allocation Vector must be equal to zero.
B) The station must have received a PS-Poll frame from the access point.
C) A time period of at least PIFS must have passed.
D) A time period of at least DIFS must have passed.
E) All collision arbitration must be completed on the RF medium.
F) The Backoff Timer must be equal to zero.

Solutions: