PW0-270 試験問題を無料オンラインアクセス

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

With what access category's parameters are WLAN multicast video frames transmitted when the EDCAF is in use by the transmitting station?

• A.AC_BK
• B.AC_BE
• C.AC_VO
• D.AC_VI

When a client station operating under EDCA sends an RTS frame and NAV protection is desired for only the first or sole frame in the TXOP, the duration field will contain an amount of time, measured in microseconds, equal to which of the following?

• A.1 CTS, 2 ACK, 1 DATA, 2 SIFS
• B.1 CTS, 1 ACK, 1 DATA, 3 SIFS
• C.1 RTS, 1 CTS, 2 ACK , 1 DATA, 4 SIFS
• D.1 RTS, 1 ACK, 1 DATA, 2 SIFS, 1 DIFS
• E.The entire duration of the TXOP
• F.1 RTS, 2 ACK, 1 DATA, 4 SIFS

In which 802.11 frames is the SSID present, provided the SSID is not removed through proprietary software configuration by an administrator? (Choose 3)

• A.Association Response
• B.Authentication
• C.Disassociation
• D.Probe Response
• E.Association Request
• F.Reassociation Request

ABC Company is having VoWiFi latency problems on their 802.11g WLAN. A wireless administrator has noticed in the phone's client utilities software that the MAC CRC Error count is higher on stations with problems than on those client stations without problems.
A high MAC CRC Error count is attributable to which of the following? (Choose 3)

• A.High multipath conditions due to an RF environment with highly reflective materials
• B.Two access points with overlapping coverage on a single channel
• C.2.4 GHz ISM band interference from sources such as wireless video cameras and analog phones
• D.Co-located DCF and EDCA access points that are using non-overlapping 2.4 GHz channels
• E.High collision rates due to dense population of voice stations and no admission control
• F.Dynamic Rate Switching algorithms that decrease data rates for latency-sensitive applications