Online Access Free PW0-205 Practice Test

Referring to the diagram, match label boxes A and B with their appropriate name.

• A.A = Frame Control Period, B = Backoff Window
• B.A = Data Period, B = Interframe Space Period
• C.A = ATIM Window, B = Data Window
• D.A = Contention-Free Period, B = Contention Period
• E.A = Congestion Control Period, B = Arbitration Window

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

Using the wireless protocol analyzer trace shown, a wired station (00:C0:9F:07:66:26) is sending a Ping Request to an 802.11b wireless client station (00:0C:30:52:93:6A). What is the best explanation as to why the Ping Request is being sent from the access point to the wireless client station at 11 Mbps while the Ping Reply is being sent from the wireless client station to the access point at 5.5 Mbps?

• A.Another client station is sending data to the same access point at a data rate of 5.5 Mbps, causing all client stations in its immediate area to transmit at the same rate.
• B.Transmission and reception rates are configured independently on each client station and announced to the access point in probe requests.
• C.The client station is moving further from the access point and has slowed its transmission rate to signal to the access point that it should do the same.
• D.An RF interference source is located near the client station causing it to slow its transmission rate in order to successfully communicate with the access point.

In an 802.11b PLCP header, what does the 16-bit length field indicate?

• A.The size in octets of the MPDU being transferred in the PPDU
• B.The size in bits of the entire PPDU frame
• C.The length of time in microseconds it will take to transmit the MPDU
• D.The length of time in kilomicroseconds it will take to transmit the PSDU

While operating in DCF mode, stations and access points must use a backoff algorithm in order to arbitrate for medium access. During what specific period of time is the backoff timer decremented?

• A.During the Defer Window
• B.During the Contention Window
• C.During a DCF Interframe Space
• D.During any part of the Superframe
• E.During the Contention-free Period