CWDP-304無料問題集「CWNP Certified Wireless Design Professional」

質問 1

You are site surveying a network for VoWiFi. You have positioned an AP for a manual survey and are moving away from the AP with a phone in Survey Mode in your hand and you are reading the RSSI value of the signal received from the AP. You have previously determined that the noise floor was approximately -94 dBm on this floor of the building. The phones documentation does not specify a recommended RSSI or SNR value for best performance.
Based on the information provided and the type of device (VoWiFi phone) you are deploying, what minimum RSSI should you plan for in all areas you are monitoring and where VoWiFi service is desired?

（A）- 62 dBm

（B）- 72 dBm

（C）- 75 dBm

（D）- 67 dBm

正解：D 解答を投票する

質問 2

A controller-based WLAN infrastructure has its controller on a different subnet than its APs. What device must be used to enable any communication between the Controller and the APs?

（A）PoE Layer 2 switch

（B）NTP server

（C）Wireless bridge

（D）Router

正解：D 解答を投票する

質問 3

Which definition correctly describes the "local MAC" variation of the centralized WLAN architecture?

（A）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.

（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）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,

（D）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.

正解：D 解答を投票する

質問 4

You are configuring an 802.11ac AP using manual channel planning. The design specification calls for the current AP to be placed on channel 56 in 5 GHz and to disable the 2.4 GHz radio.
For what could the 2.4 GHz radio be used if not standard AP operations?
Response:

（A）Security monitoring

（B）PCI DSS encoding

（C）Controller-based channel assignment

（D）Bluetooth access

正解：D 解答を投票する

質問 5

One of your customers plans on providing wireless coverage to a warehouse facility. After performing an initial walkthrough, you collect the following information:
The central part of the warehouse is between 400 and 600 feet (122 to 183 meters) from the warehouse switches mounted on the walls.
# The warehouse storage is composed of metallic racks with varying inventory levels and contents, from electronics and plastic toys to food pallets and juice bottles.
# Workers need basic data coverage from their working location, and are not highly mobile. They usually work from one single aisle, and their laptop is on a cart with wheels.
What would be your one recommendation to provide coverage to the central area of the warehouse?

（A）Position APs along the walls, and equip the APs with Yagi antennas to cover the central area.

（B）Install APs for client access in the central area and use a mesh backhaul link to connect to the DS.

（C）In this case, extend the cable length just beyond 328 feet (100 m) and position APs as close as possible to the central area of the warehouse.

（D）Equip workers laptops with a directional antenna and install APs less than 328 feet (100m) away from the switch.

正解：C 解答を投票する

質問 6

Excessive uplink RTP frame retransmissions can result in ____________.

（A）Head-of-Line blocking at the receiver

（B）MOS scores in excess of 5

（C）Deauthentication of the transmitter by the receiver

（D）Lowering of the data transmission rate by the transmitting station

正解：D 解答を投票する

質問 7

When performing a roaming test and packet capture at the same time, what are two particular frames that will be present when roaming between two APs is successful?

（A）Probe Request and Probe Response

（B）Reassociation Request and Reassociation Response

（C）Beacon and DTIM

（D）Association Request and Association Response

正解：B 解答を投票する

質問 8

What is a radome?

（A）A weatherproof piece of plastic covering an antenna or antenna system.

（B）A type of semi-circular ceiling found in atriums and that is a heavy cause of RF reflection.

（C）The unit used to measure the signal reflected backward by the end of a cable.

（D）A piece of metal positioned behind APs mounted on outdoor poles, designed to limit the butterfly effect.

正解：A 解答を投票する

質問 9

You ate evaluating CO impact in 2 4 GHz. During the post-validation survey, you determine that 2 or 3 APs are seen from every location in the 2 4 GHz band with signal strengths above -75 dBm from all seen Aps.
Does this show that CO has been removed from the environment given that three non-overlapping channels exist in 2.4 GHz and why?

（A）Yes, because the goal is to see only l AP at each location in 2 4 GHz

（B）No, because the goal is to see only 1 AP at each location in 2 4 GHz

（C）No, because CCI can exist even with signals as low as -85 dBm to -93 dBm

（D）Yes because you would see 3 APs m every location with a signal strength above -75 dBm if CO exists

正解：C 解答を投票する

質問 10

How much more power can a 1 Mbps 802.11b signal have than a 54 Mbps 802.11g signal if it is sent through a saturated amplifier?
Response:

（A）5 dBm

（B）5 dB

（C）2 dBm

（D）2 dB

正解：B 解答を投票する

質問 11

What best describes ensuring coverage requirements in a deployed WLAN?

（A）Verifying that the WLAN can be seen from all required locations

（B）Measuring the signal strength and number of APs at each location and comparing it to the requirement specifications

（C）Verifying that a 3x3:3 gaming laptop can connect to the WLAN from all required locations

（D）Verifying that you can connect to the WLAN from all required locations with the least capable device

正解：D 解答を投票する

質問 12

When using a predictive design tool, you have selected APs with an antenna gain 3 dBi and set the transmit power of the predicted APs to 25 mW.
What should be EIRP of the APs in the design?

（A）125 mW

（B）6.25 mW

（C）17 dBm

（D）11 dBm

正解：C 解答を投票する

質問 13

ABC Company has a WLAN controller with 10 controller-based APs; the Voice SSID is configured for centralized data forwarding. Each AP is connected to an access port on a layer-2 Ethernet switch. Each layer-2 switch is uplinked to a single layer-3 core Ethernet switch. The WLAN controller is connected directly to the layer-3 core Ethernet switch. Layer-3 tunnels are created between all controller-based APs and the WLAN controller. A voice server is connected to the layer-3 Ethernet switch.
When a voice-enabled QoS STA sends an IP data packet to a voice server in this scenario, the DSCP value carried in the STA's IP data packet gets mapped to what and by which device?

（A）The DSCP value is mapped to an IEEE 802.1Q VLAN tag by the access point.

（B）The DSCP value is mapped to the DSCP value in the encapsulating IP header by the layer-3 switch.

（C）The DSCP value is mapped to an IEEE 802.1p (802.1D-2004) UP value by the access point.

（D）The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.

正解：D 解答を投票する

CWDP-304 無料問題集「CWNP Certified Wireless Design Professional」

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