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In an 802.11n 2.4 GHz BSS, what prevents each station fromusing the full network bandwidth (e.g. 130 Mbps) for user data throughput when multiple clients are actively exchanging data with the AP?

A. Radio receiver hardware cannot process data as quickly as it can be transmitted.

B. Half of the bandwidth is allocated to uplink traffic and half to downlink traffic.

C. WLAN devices cannot detect collisions and must receive positive frame acknowledgment.

D. APs do not have sufficient wired connection speeds to the LAN, even at 1 Gbps connections with 802.11n and earlier APs.

ABC Hospital is planning a Wi-Fi infrastructure upgrade wherethe 802.11b/g APs (HR/DSSS and ERP)

would be replaced with new dual-radio 802.11n/802.11ac (HT and VHT) APs. ABC wants to minimize the

time and cost associated with performing a new site survey, so they will be mounting all of the new APs in

the same locations and with the same cable drops as the existing APs.

What is one performance drawback with this deployment method?

A. Multipath will increase, causing excessive layer-2 retransmissions. The retransmissions will cause latency for VoWiFi handsets.

B. Increased receiver sensitivity on theVHT APs will cause them to continually change channels to avoid co-channel interference.

C. If the existing UTP cabling is not Category 3 or better, the total Ethernet backhaul for each AP will be limited to 100 Mbps.

D. The existing WLAN plan, including the AP locations, may not provide the benefits seen in HT and VHT

802.11 PHY capabilities.

You are anindependent contractor, hired to perform an indoor site survey and network design for Luxury Full Service Hotels International. The network will support hotel staff and guest users. You are interviewing the network manager to determine business, performance, and security requirements for the future 802.11 WLAN.

What questions should you ask the IT manager? (Choose 2)

A. What data cabling is currently installed in the rooms and throughout the hotel?

B. How much RF loss do you expect between hotel rooms?

C. Who installed your existing wired network?

D. What types of applications will be used by the hotel staff?

E. On what frequency do the microwave ovens operate in the hotel suites?

XYZ Company has decided to install an 802.11 WLAN system that will support 1000 wireless users, but they are concerned about network security. XYZ is interested in deploying standardized security features. In addition to WPA2-Enterprise with PEAP and role-based access control, XYZ would like to support management frame protection as well as a fast secure roaming protocol for future mobile handsets.

As XYZ Company selects a product to deploy, what two IEEE amendments, which are included in 802.112012, should be supported to provide the management frame protection and fast secure roaming security features?

A. 802.11j and 802.11k

B. 802.11z and 802.11w

C. 802.11r and 802.11w

D. 802.11r and 802.11k

What factors are taken into account when calculating theLink Budget of a point-to-point outdoor WLAN bridge link?

A. Antenna height

B. Transmit power

C. Operating frequency

D. Transmit antenna gain