CWDP-302 Certified Wireless Professional Practice Exam Set 3

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

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

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.
  • 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
  • This configuration violates the IEEE specification that defines 6, 12, and 24 Mbps as mandatory data rates for 802.11g/n.
  • 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 desire to achieve a 450 Mbps MCS. What 802.11n features (from the numbered list below) are required?


Options are :

  • 40 MHz channels
  • Frame aggregation
  • 3 spatial streams
  • 2 spatial streams
  • Short GI

Answer : 40 MHz channels 3 spatial streams Short GI

CWDP-302 Certified Wireless Professional Practice Exam Set 4

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


Options are :

  • CS3
  • EF
  • AF31
  • VO

Answer : EF

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 minimum transmit data rate value
  • The CTS-to-self threshold
  • The sequence control field value
  • The acknowledgement timeout threshold

Answer : The acknowledgement timeout threshold

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 :

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

Answer : Video-on-demand

CWDP-302 Certified Wireless Professional Practice Exam Set 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?


Options are :

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

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

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 :

  • 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.
  • 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 PS-Poll frames.
  • 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-and-delivery 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.

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


Options are :

  • 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 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.
  • 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.
  • 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.

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.

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 :

  • Multicasting
  • IPSec
  • IPv6
  • Secure TCP

Answer : Multicasting

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
  • 65 Mbps
  • 108 Mbps
  • 54 Mbps

Answer : 144 Mbps

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 managementToughbooks (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 :

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

Answer : Short guard intervals

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 :

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

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

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


Options are :

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

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

Answer : Latency

CWDP-302 Certified Wireless Design Professional Exam Set 2

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 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.
  • The WLAN controller does not mark the 802.11 frames with priority values only the Layer 3 routers can do this.
  • The WLAN controller does not mark 802.11 frames with priority values only the APs 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.

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 :

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

Answer : Elevation chart

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

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

CWDP-302 Certified Wireless Design Professional Exam Set 3

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 ?Trusted Root Certification Authorities? list
  • The ?Do not prompt user to authorize new servers or trusted certification authorities? option
  • The ?Validate server certificate? option

Answer : The ?Validate server certificate? option

You have enabled a feature in a controller-based environment that results in data arriving at the destination more quickly when sent through the APs. It also limits some other features of the solutions.What feature has been enabled?


Options are :

  • Distributed forwarding
  • Frame fragmentation
  • Centralized forwarding
  • SSID hiding

Answer : Distributed forwarding

CWDP-302 Certified Wireless Design Professional Exam Set 4

When installing a cloud-based AP, what is the most common process used?


Options are :

  • Connect the AP to the network and configure it from the cloud assigning a configuration or policy set to the AP.
  • Configure a profile for the AP in the cloud and then connect it for automatic configuration.
  • Configure the AP as an autonomous AP and then, when it connects to the cloud, it will be reconfigured.
  • Configure the AP with a local controller and then, when it connects to the cloud, it will be reconfigured.

Answer : Configure a profile for the AP in the cloud and then connect it for automatic configuration.

ABC, Inc. has chosen a WLAN solution that implements a controller-based architecture. The APs will discover the controller using DHCP, broadcast messages, DNS resolution or some other proprietary method. During operation, what protocol is likely to be used for the communications between the APs and the controllers?


Options are :

  • LWAPP
  • IPSec
  • PPTP
  • L2TP

Answer : LWAPP

You are designing security for a WLAN. You plan to use a RADIUS server that connects with an LDAP directory for user information. The EAPoL protocol will be used between the client and the AP.What default port is commonly used for LDAP server access?


Options are :

  • 389
  • 80
  • 8080
  • 443

Answer : 389

CWDP-302 Certified Wireless Design Professional Exam Set 5

Which one of the following is the most effective way to determine if radar will force APs away from DFS channels?


Options are :

  • Use a protocol analyzer looking for radar
  • View the AP logs looking for DFS events.
  • Use a spectrum analyzer looking for radar.
  • View the wired router logs looking for DFS events.

Answer : Use a spectrum analyzer looking for radar.

When testing the signal strength and capacity in a site survey, which client type is generally best to use?


Options are :

  • the most capable client type that will be used on the network.
  • a 3x3:3 laptop
  • the least capable client type that will be used on the network
  • a single stream tablet

Answer : a 3x3:3 laptop

What might a PoE injector be used for during a site survey?


Options are :

  • to test throughput
  • to power APs
  • to act as a WLAN client
  • to adjust signal strength

Answer : to power APs

CWDP-302 Certified Wireless Professional Practice Exam Set 1

All of the APs in the WLAN you have designed are using the same RF channel. You plan to add a VoIP network in the future that will include several more APs that all use the same RF channel, but different from the existing WLAN design.What model is certainly in use?


Options are :

  • Autonomous
  • MCA
  • SCA
  • Cloud-based

Answer : SCA

What should always be done before connecting an AP to the production network?


Options are :

  • Reduction of output power.
  • Increase in output power.
  • Baseline configuration that prevents the introduction of security issues to the network on initial connection.
  • Disabling SSID broadcasting.

Answer : Baseline configuration that prevents the introduction of security issues to the network on initial connection.

When planning for a VoIP WLAN installation, what metric is important and is often dealt with using buffers?


Options are :

  • Delay
  • Jitter
  • RTT
  • Latency

Answer : Jitter

You are designing the implementation plan for a WLAN that requires each AP to be updated manually. The APs must be configured individually or through configuration loads and modifications of key settings, such as the SSID and radio channels.What architecture is being used?


Options are :

  • Controller-based
  • Autonomous
  • Virtual controller
  • Cloud-based

Answer : Controller-based

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