CWDP-302 Certified Wireless Design Professional Exam Set 1

You have determined the best mounting locations for APs in a given installation. The facilities manager has asked you to change the locations for several APs due to aesthetic concerns. You suggest mounting the APs in the ideal locations and painting them so they go unnoticed in the environment.

What is a valid recommendation or consideration when painting APs? 


Options are :

  • Most AP models for indoor environments come in a variety of form factors and colors. Painting is never recommended.
  • Always use paints with metallic dye in them to prevent potential RF propagation impact.
  • Painting APs may void the product manufacturer’s warranty
  • Painting APs will significantly reduce the output power

Answer : Painting APs may void the product manufacturer’s warranty

CWDP-302 Certified Wireless Design Professional Exam Set 2

You are selecting external antennas for use in a bridge link deployment. What chart should you request from the antenna vendors to make an accurate selection?   


Options are :

  • dBm to dB conversion chart
  • Antenna coating chart
  • mW to dBm conversion chart
  • Elevation chart

Answer : Elevation chart

Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as some clients, to support 802.11ac. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac, WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not support WMM.

Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN? 


Options are :

  • The WLAN infrastructure will set the dozing times of the WMM-PS certified client devices based upon their WMM access category, while the non-WMM-PS client devices will continue to use PSPoll frames.
  • All WMM-PS certified client devices will be prevented from utilizing WMM-PS features until all stations in use on the wireless medium are WMM-PS certified.
  • Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.
  • WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the trigger-anddelivery mechanism, but WMM-PS stations will get priority.

Answer : Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.

Given: The 802.11ac APs you have selected for your public access deployment support many of the PHY and MAC enhancements offered by the 802.11n and 802.11ac amendments. The AP is configured for a 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? 


Options are :

  • 144 Mbps
  • 54 Mbps
  • 65 Mbps
  • 108 Mbps

Answer : 144 Mbps

CWDP-302 Certified Wireless Design Professional Exam Set 3

As an implementation engineer, you have just received initial design specs from a network designer for your dual-band 802.11n deployment. The network design documents prescribe the following data rate configuration for the 2.4 GHz radio:

Basic Rates — 5.5, 6, 11, 12 Mbps

Supported Rates —9, 18, 24, 36, 48, and 54 Mbps as well as MCS 0-15

What will result from this design strategy? 


Options are :

  • Protection mechanisms will always be in use on this network to support 5.5 and 11 Mbps as basic rates.
  • This configuration violates the IEEE specification that defines 6, 12, and 24 Mbps as mandatory data rates for 802.11g/n.
  • By disabling support for 1 and 2 Mbps while allowing 5.5 and 11 Mbps, the network will force 802.11b clients to use these higher data rates.
  • HR/DSSS (802.11b) stations will not be able to associate to the service set.

Answer : HR/DSSS (802.11b) stations will not be able to associate to the service set.

You are working on a VoWLAN design with your customer’s wired networking team. How many distinct priority levels do you expect for the voice applications?   


Options are :

  • 1 priority level per client and AP pair, so the total number depends on the expected number of clients
  • 1 priority level for voice RTP, 1 priority level for voice control and RTCP
  • 1 priority level, but 2 queues (one for uplink traffic, one for downlink traffic)
  • 1 priority level for VoWLAN client traffic, 1 priority level for wired VoIP client traffic

Answer : 1 priority level for voice RTP, 1 priority level for voice control and RTCP

When live video streaming solutions that transmit simultaneously to more than one recipient are used, what special capability should be considered and configured in all affected WLAN implementations? 


Options are :

  • IPv6
  • Secure TCP
  • Multicasting
  • IPSec

Answer : Multicasting

CWDP-302 Certified Wireless Design Professional Exam Set 4

You desire to achieve a 450 Mbps MCS. What 802.11n features (from the numbered list below) are required?

1. Frame aggregation

2. Short GI

3. 40 MHz channels

4. 2 spatial streams

5. 3 spatial streams

6. Transmit beam forming (TxBF)   


Options are :

  • 2, 3, 5
  • 2, 3, 2
  • 1, 2, 3, 5
  • 1, 2, 3, 4, 6

Answer : 2, 3, 5

You are tasked with designing the WLAN to accommodate certain high density areas on your university campus where users frequently come and go. With a limited DHCP pool size (subnet mask = 255.255.252.0) for this WLAN subnet, you want to ensure that your DHCP addresses are used efficiently and are not exhausted, which would prevent new client Layer 3 connections. The DHCP server is a Windows Server 2012 R2 machine. Your design task is to determine the best configuration to allow as many users as possible while avoiding WLAN service interruptions and also to use the available addresses as efficiently as possible.

What setting would be most effective at achieving this design task? 


Options are :

  • Set the RTS threshold to 2346 bytes
  • Set the inactive wireless client timeout (client age-out) to 5 minutes
  • Set the maximum client limit per radio to 64
  • Set the DHCP lease for this pool to 20 minutes

Answer : Set the DHCP lease for this pool to 20 minutes

When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to distributed?   


Options are :

  • APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.
  • Centralized control functions, such as key management and distribution, RRM, and load balancing will no longer be supported.
  • All RRM controls will also need to be distributed to a master AP that acts as a channel and transmit power arbiter for other APs in the ESS
  • The router between the APs and the controller must be made aware of the APs as forwarding client STAs.

Answer : APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.

CWDP-302 Certified Wireless Design Professional Exam Set 5

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


Options are :

  • 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.
  • 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.
  • 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.
  • 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.

Answer : 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.

In a manufacturing facility with highly reflective materials, you are planning an upgrade to your existing 802.11b WLAN implementation. You have chosen a dual-band 802.11n infrastructure product for this purpose. Your client applications include:

Handheld scanners — for inventory management

Toughbooks (laptops) — mounted on forklifts for inventory and workflow management

VoWiFi phones — used by select employees throughout the facility

You are evaluating all of the 802.11n enhancements and determining which features to enable for your environment and applications.

In this scenario, what 802.11n enhancement typically should NOT be enabled on the 2.4 GHz radio of the new APs?   


Options are :

  • Frame aggregation
  • Short guard intervals
  • Block Acknowledgments
  • Multiple streams

Answer : Short guard intervals

As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your applications. One of the popular applications used on your network requires high bandwidth and low to medium Wi-Fi loss, but can tolerate moderate latency and jitter.   

What application matches this description? 


Options are :

  • Voice
  • Video-on-demand
  • Email
  • Skype chat

Answer : Video-on-demand

CWDP-302 Certified Wireless Professional Practice Exam Set 1

When implementing WLAN security according to common best practices, what feature should be enabled when configuring an EAP type? 


Options are :

  • The “Use WEP if RADIUS server unavailable” option
  • The “Validate server certificate” option
  • The “Do not prompt user to authorize new servers or trusted certification authorities” option
  • The “Trusted Root Certification Authorities” list

Answer : The “Validate server certificate” option

What VoWiFi implementations frequently require multicast packet delivery support by the WLAN infrastructure? 


Options are :

  • Push-to-Talk VoWiFi phones
  • All VoWiFi soft phones
  • All VoWiFi implementations
  • All VoWiFi hard phones

Answer : Push-to-Talk VoWiFi phones

Which one of the following is an essential metric to measure when performing a survey and design for VoIP across WLANs? 


Options are :

  • Latency
  • PoE provided to wireless handsets
  • Throughput rates above 50 Mbps
  • Data rates above 100 Mbps

Answer : Latency

CWDP-302 Certified Wireless Professional Practice Exam Set 2

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?   


Options are :

  • 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.
  • Install APs for client access in the central area and use a mesh backhaul link to connect to the DS.
  • Position APs along the walls, and equip the APs with Yagi antennas to cover the central area
  • Equip workers laptops with a directional antenna and install APs less than 328 feet (100m) away from the switch.

Answer : Install APs for client access in the central area and use a mesh backhaul link to connect to the DS.

What is the DSCP Per Hop Behavior equivalent classification of the 802.11 AC_VO priority level? 


Options are :

  • AF31
  • EF
  • CS3
  • VO

Answer : EF

When a WLAN controller sends an 802.11 frame to a lightweight AP for transmission on the wireless medium, how does it mark the frame for 802.11 QoS priority? 


Options are :

  • The WLAN controller does not mark 802.11 frames with priority values only the APs can do this
  • The WLAN controller does not mark the 802.11 frames with priority values only the Layer 3 routers can do this.
  • The WLAN controller will place the user priority (UP) value in the QoS Control field of the 802.11 frame header before passing it to the lightweight AP.
  • The WLAN controller does not mark the 802.11 frames with priority values only the Layer 3 switches can do this.

Answer : The WLAN controller will place the user priority (UP) value in the QoS Control field of the 802.11 frame header before passing it to the lightweight AP.

CWDP-302 Certified Wireless Professional Practice Exam Set 3

When deploying long-distance 802.11 bridge links (10 miles / 16 km), what parameter may be critical for improving data flow by reducing retries caused by the long distances? 


Options are :

  • The sequence control field value
  • The CTS-to-self threshold
  • None of the Above
  • The acknowledgement timeout threshold
  • The minimum transmit data rate value

Answer : The acknowledgement timeout threshold

You have determined the best mounting locations for APs in a given installation. The facilities manager has asked you to change the locations for several APs due to aesthetic concerns. You suggest mounting the APs in the ideal locations and painting them so they go unnoticed in the environment.

What is a valid recommendation or consideration when painting APs? 


Options are :

  • Most AP models for indoor environments come in a variety of form factors and colors. Painting is never recommended.
  • Always use paints with metallic dye in them to prevent potential RF propagation impact.
  • Painting APs may void the product manufacturer’s warranty
  • Painting APs will significantly reduce the output power

Answer : Painting APs may void the product manufacturer’s warranty

CWDP-302 Certified Wireless Professional Practice Exam Set 4

You are selecting external antennas for use in a bridge link deployment. What chart should you request from the antenna vendors to make an accurate selection?   


Options are :

  • dBm to dB conversion chart
  • Antenna coating chart
  • mW to dBm conversion chart
  • Elevation chart

Answer : Elevation chart

Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging wireless network infrastructure, as well as some clients, to support 802.11ac. In your research, you have discovered that your new wireless client devices and infrastructure are 802.11ac, WMM, and WMM-PS certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not support WMM.

Given this information, what scenario is possible when your company's employees begin using both types of client devices on the new WLAN? 


Options are :

  • The WLAN infrastructure will set the dozing times of the WMM-PS certified client devices based upon their WMM access category, while the non-WMM-PS client devices will continue to use PSPoll frames.
  • All WMM-PS certified client devices will be prevented from utilizing WMM-PS features until all stations in use on the wireless medium are WMM-PS certified.
  • Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.
  • WMM-PS enabled APs will allow both WMM-PS and non-WMM-PS stations to use the trigger-anddelivery mechanism, but WMM-PS stations will get priority.

Answer : Performance and battery life will be inconsistent between WMM-PS and non-WMM-PS client devices when used with applications that support WMM-PS.

Given: The 802.11ac APs you have selected for your public access deployment support many of the PHY and MAC enhancements offered by the 802.11n and 802.11ac amendments. The AP is configured for a 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? 


Options are :

  • 144 Mbps
  • 54 Mbps
  • 65 Mbps
  • 108 Mbps

Answer : 144 Mbps

CWDP-302 Certified Wireless Professional Practice Exam Set 5

As an implementation engineer, you have just received initial design specs from a network designer for your dual-band 802.11n deployment. The network design documents prescribe the following data rate configuration for the 2.4 GHz radio:

Basic Rates — 5.5, 6, 11, 12 Mbps

Supported Rates —9, 18, 24, 36, 48, and 54 Mbps as well as MCS 0-15

What will result from this design strategy? 


Options are :

  • Protection mechanisms will always be in use on this network to support 5.5 and 11 Mbps as basic rates.
  • This configuration violates the IEEE specification that defines 6, 12, and 24 Mbps as mandatory data rates for 802.11g/n.
  • By disabling support for 1 and 2 Mbps while allowing 5.5 and 11 Mbps, the network will force 802.11b clients to use these higher data rates.
  • HR/DSSS (802.11b) stations will not be able to associate to the service set.

Answer : HR/DSSS (802.11b) stations will not be able to associate to the service set.

You are working on a VoWLAN design with your customer’s wired networking team. How many distinct priority levels do you expect for the voice applications?   


Options are :

  • 1 priority level per client and AP pair, so the total number depends on the expected number of clients
  • 1 priority level for voice RTP, 1 priority level for voice control and RTCP
  • 1 priority level, but 2 queues (one for uplink traffic, one for downlink traffic)
  • 1 priority level for VoWLAN client traffic, 1 priority level for wired VoIP client traffic

Answer : 1 priority level for voice RTP, 1 priority level for voice control and RTCP

When live video streaming solutions that transmit simultaneously to more than one recipient are used, what special capability should be considered and configured in all affected WLAN implementations? 


Options are :

  • IPv6
  • Secure TCP
  • Multicasting
  • IPSec

Answer : Multicasting

You desire to achieve a 450 Mbps MCS. What 802.11n features (from the numbered list below) are required?

1. Frame aggregation

2. Short GI

3. 40 MHz channels

4. 2 spatial streams

5. 3 spatial streams

6. Transmit beam forming (TxBF)   


Options are :

  • 2, 3, 5
  • 2, 3, 2
  • 1, 2, 3, 5
  • 1, 2, 3, 4, 6

Answer : 2, 3, 5

You are tasked with designing the WLAN to accommodate certain high density areas on your university campus where users frequently come and go. With a limited DHCP pool size (subnet mask = 255.255.252.0) for this WLAN subnet, you want to ensure that your DHCP addresses are used efficiently and are not exhausted, which would prevent new client Layer 3 connections. The DHCP server is a Windows Server 2012 R2 machine. Your design task is to determine the best configuration to allow as many users as possible while avoiding WLAN service interruptions and also to use the available addresses as efficiently as possible.

What setting would be most effective at achieving this design task? 


Options are :

  • Set the RTS threshold to 2346 bytes
  • Set the inactive wireless client timeout (client age-out) to 5 minutes
  • Set the maximum client limit per radio to 64
  • Set the DHCP lease for this pool to 20 minutes

Answer : Set the DHCP lease for this pool to 20 minutes

When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to distributed?   


Options are :

  • APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.
  • Centralized control functions, such as key management and distribution, RRM, and load balancing will no longer be supported.
  • All RRM controls will also need to be distributed to a master AP that acts as a channel and transmit power arbiter for other APs in the ESS
  • The router between the APs and the controller must be made aware of the APs as forwarding client STAs.

Answer : APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.

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