Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?
A. All MAC functions are performed by the AP. A minimal subset of network control is offloaded to the WLAN controller along with management and monitoring functions.
B. PHY functions are performed directly by the AP. MAC functions are divided almost equally between the WLAN controller and the AP, according to the time sensitivity of the feature or service.
C. The AP provides the RF termination point for the WLAN, but performs very few of the WLAN functions or services. The WLAN controller performs all MAC functions and the AP is very simple and lightweight.
D. All RF-, data-, and control-related WLAN functions are performed by the AP. APs coordinate network services with one another and are managed by a WNMS, so no WLAN controller is used in this architecture.
Multicast video applications typically require special treatment on the Wi-Fi network due to the nature of multicast traffic. Many vendors implement proprietary multicast-to-unicast conversion for this reason.
Which of the following is NOT a valid reason for special unicast conversion of downlink multicast traffic?
A. In QoS WLANs, multicast traffic is always assigned to the best effort (AC_BE) transmit queue.
B. Group addressed downlink frames are not acknowledged on the wireless medium.
C. Multicast traffic must always be transmitted via omnidirectional antennas.
D. Frames with a group receiver address must always be sent at a rate in the Basic Rate Set.
Given: The 802.11n APs you have selected for your public access deployment support many of the PHY and MAC enhancements offered by the 802.11n standard. The AP is single-band (2.4 GHz) and only allows 20 MHz channels. The WLAN radio in the AP is a 3x3 802.11n chip that supports two spatial streams.
What is the maximum MCS rate that could be supported by this AP?
A. 54 Mbps
B. 65 Mbps
C. 108 Mbps
D. 144 Mbps
E. 150 Mbps
F. 300 Mbps
What is the purpose of DHCP Option 43, and how is it used with WLANs?
A. It provides clients with a temporary IP address on a restricted VLAN until 802.1X authentication is completed. Then the client receives its long-term IP address.
B. It provides IP address bindings for specific network nodes that require long-term IP address assignments. WLAN controllers are configured to use Option 43 to receive long-term IP address leases that are centrally managed with DHCP.
C. It supports vendor-specific IP address attributes for node discovery purposes. APs use Option 43 with vendor class identifiers to obtain the IP address of a centralized WLAN controller.
D. It integrates a DHCP server with AAA servers and user databases to dynamically assign IP addresses to client devices. During 802.1X, the AAA server uses Option 43 to notify the DHCP server what IP pool the client's address should be drawn from.
You deployed an AP and installed its antenna, and you now need to set the AP transmit power. Given a desired EIRP of 21 dBm, and an antenna gain of 5.85 dBd connected through 25 feet of cable with a loss specification of 4 dB/100 feet. Assuming that there is no significant loss from the connectors, what should be the transmit power level for this AP?
A. 10 mW
B. 14 mW
C. 20 mW
D. 25 mW
E. 40 mW
F. 50 mW
Assume that your network operates in a regulatory domain that allows use of UNII-1, UNII-2, UNII- 2e, UNII-3, and the 5.8 GHz ISM band for indoor Wi-Fi. In your upcoming 802.11n deployment, you would like to take advantage of the performance improvements that result from channel bonding. However, after extensive testing, you have determined that your mission-critical WLAN should not use channels requiring DFS support.
Given those two criteria (enable channel bonding and disable DFS channels), in the 5 GHz spectrum, how many non-overlapping channels will your system be able to use?
A. 2
B. 3
C. 4
D. 6
E. 11
Assuming an identical RF environment,
which one of these scenarios is most likely to lead to a client-to-AP link imbalance in which one- way communication results?
A. Option A
B. Option B
C. Option C
D. Option D
You are testing a VoWLAN deployment, and your communication measurements show a certain amount of lost packets. What would be an acceptable packet error rate value to still provide acceptable call quality?
A. There should be 0% error in a VoWLAN type of deployment
B. No more than 1% PER max should be acceptable
C. No more than 4% PER max should be acceptable
D. No more than 8% PER max should be acceptable
E. No more than 12% PER max should be acceptable
Multicast video applications typically require special treatment on the Wi-Fi network due to the nature of multicast traffic. Many vendors implement proprietary multicast-to-unicast conversion for this reason.
Which of the following is NOT a valid reason for special unicast conversion of downlink multicast traffic?
A. Multicast traffic must always be transmitted via omnidirectional antennas.
B. Group addressed downlink frames are not acknowledged on the wireless medium.
C. In QoS WLANs, multicast traffic is always assigned to the best effort (AC_BE) transmit queue.
D. Frames with a group receiver address must always be sent at a rate in the Basic Rate Set.
What is the DSCP Per Hop Behavior equivalent classification of the 802.11e AC_VO priority level?
A. AF31
B. EF
C. VO
D. AF12
E. CS3
