CWDP-302 Certified Wireless Professional Practice Exam Set 2

Which one of the following is a valid argument against using 80 MHz 8902.11ac channels?


Options are :

  • The total number of unique channel configurations for each AP is lessened.
  • When 80 MHz channels are used; 40 MHz adapters or clients cannot connect.
  • 80 MHz channels reduce the data rate, and therefore throughput, of the BSS significantly
  • 80 MHz channels are not supported in any enterprise APs.

Answer : 80 MHz channels are not supported in any enterprise APs.

Which one of the following scenarios is more likely to warrant the use of external antennas with an AP?


Options are :

  • Standard office space deployment
  • Indoor mesh links
  • Outdoor access network
  • Outdoor bridge link

Answer : Outdoor bridge link

CWDP-302 Certified Wireless Professional Practice Exam Set 3

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


Options are :

  • Latency
  • RTT
  • Jitter
  • Delay

Answer : Jitter

When Kerberos is used as an authentication protocol, what network service is essential for authentication to succeed assuming the appropriate credentials are provided?


Options are :

  • SFTP
  • NTP
  • TFTP
  • FTPS

Answer : FTPS

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 :

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

Answer : Distributed forwarding

CWDP-302 Certified Wireless Professional Practice Exam Set 4

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 :

  • PPTP
  • LWAPP
  • IPSec
  • L2TP

Answer : LWAPP

As part of the design for a large WLAN that will include hundreds of APs operating in both 2.4 GHz and 5 GHz bands, you are changing AP settings so that APs on the same channel are spaced significantly far apart such that they have lessened impact on each other's BSAs. What common WLAN program are you attempting to diminish?


Options are :

  • Incorrect security settings
  • CCI
  • ACI
  • Bluetooth interface

Answer : CCI

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


Options are :

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

Answer : Use a spectrum analyzer looking for radar.

CWDP-302 Certified Wireless Professional Practice Exam Set 5

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 :

  • Cloud-based
  • Autonomous
  • MCA
  • SCA

Answer : SCA

What kind of antenna results in a nearly circular pattern on the azimuth chart but a very flat donut shape on the elevation chart?


Options are :

  • 20 degree vertical yagi
  • 60 degree horizontal patch
  • 120 degree horizontal sector
  • High gain omni-directional

Answer : High gain omni-directional

What is a radome?


Options are :

  • A piece of metal positioned behind APs mounted on outdoor poles, designed to limit the butterfly effect.
  • A type of semi-circular ceiling found in atriums and that is a heavy cause of RF reflection.
  • A weatherproof piece of plastic covering an antenna or antenna system.
  • The unit used to measure the signal reflected backward by the end of a cable.

Answer : A weatherproof piece of plastic covering an antenna or antenna system.

You are creating an outdoor bridge link that spans more than 1000 yards. Which one of the following antenna types is more likely to be included in the design?


Options are :

  • Panel
  • Omni
  • Yagi
  • Patch

Answer : Yagi

Assume that your network operates in a regulatory domain that allows use of the entire 5 GHz space allowed in the 802.11ac amendment. In your upcoming 802.11ac 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 40 MHz channels will your system be able to use?


Options are :

  • 2
  • 4
  • 3
  • 6

Answer : 4

CWDP-302 Certified Wireless Design Professional Exam Set 1

Of the following antenna connector types, which one is the smallest?


Options are :

  • RP-TNC
  • Male N Connector
  • MC Connector
  • N Connector

Answer : MC Connector

What is the purpose of Friis transmission equation [ (LdB) = 20 log(d) + 20 log (f) - 27.55 ]?


Options are :

  • Calculate RF path loss in free space
  • Calculate earth bulge to determine minimum antenna height
  • Calculate receive sensitivity for an 802.11 radio/antenna pair
  • Calculate the loss experienced between the intentional radiator and antenna

Answer : Calculate RF path loss in free space

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?


Options are :

  • The DSCP value is mapped to an IEEE 802.1p (802.1D-2004) UP value by the access point.
  • The DSCP value is mapped to an IEEE 802.1Q VLAN tag by the access point.
  • The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.
  • The DSCP value is mapped to the DSCP value in the encapsulating IP header by the layer-3 switch.

Answer : The DSCP value is mapped to an IEEE 802.1Q priority tag value by the WLAN controller.

CWDP-302 Certified Wireless Design Professional Exam Set 2

What basic RF math formula should be used as a baseline to convert an RF value in units of dBm into a value of mW?*Note: ?dBm? in the formulas represents the known dBm value


Options are :

  • 0
  • dBm = 1 mW
  • mW
  • None

Answer : 0

Given: A WLAN controller is connected to ABC Company's core layer 3 Ethernet switch with an IEEE 802.1Q trunk connection. The WLAN controller's native VLAN is VLAN 6 and its IP address is 10.0.14.2 /24. Lightweight APs supporting centralized forwarding are connected to the network on VLANs 7, 8, and 9, and they each build a Layer 3 tunnel back to the WLAN controller's IP address.The dynamically assigned IP addresses received by each AP from a DHCP server will be ________________.


Options are :

  • Associated with a non-routable VLAN until the MAC address of the AP is removed from the controller's MAC filter
  • Associated with the VLAN on which they are connected.
  • Associated with VLAN 1, the default VLAN for new APs
  • Associated with the native VLAN of the WLAN controller.

Answer : Associated with the VLAN on which they are connected.

In a large enterprise (5000+ wireless users), by what would NOT be a recommended method by which IP addresses and VLANs are assigned to different clients associated to the same AP?


Options are :

  • Each SSID is mapped to a static VLAN assignment
  • Multiple VLAN pools are designated for an SSID and user IP addresses are selected in a round-robin fashion from the associated pools
  • Radio signal metrics (RSSI, SNR, etc.) of WLAN clients are triangulated for locationbased VLAN assignment during association
  • Upstream AAA servers dynamically assign VLANs to each user or group profile

Answer : Radio signal metrics (RSSI, SNR, etc.) of WLAN clients are triangulated for locationbased VLAN assignment during association

CWDP-302 Certified Wireless Design Professional Exam Set 3

Given: In your regulatory domain, a Tx Power Level of ?1? is equivalent to 17 dBm.For every integer increment (e.g. from 1 to 2) to the Tx Power Level, the AP's transmit power is halved. In units of mW, what is the actual transmit power for an AP configured at a Tx Power Level of ?4??


Options are :

  • 8 mW
  • 12.5 mW
  • 50 mW
  • 6.25 mW

Answer : 6.25 mW

You told your customer that multipath fading may be mitigated simply by moving one or both of the receiver's antennas a small amount, usually by one to four wavelengths away from its original position. Your customer is prepared to make the change, but does not know the wavelength for 802.11ac.What is the approximate wavelength of an 802.11ac radio wave?


Options are :

  • 45 cm (17.71 inches)
  • 12 cm (4.72 inches)
  • 15.24 cm (6 inches)
  • 5.5 cm (2.16 inches)

Answer : 5.5 cm (2.16 inches)

In a multiple channel architecture (MCA) network supporting 802.1X authentication, what aspect of WLAN design affects client roaming efficiency and effectiveness?


Options are :

  • Key caching protocols
  • PHY standard used by the AP
  • Cipher suite
  • PHY standard used by client

Answer : Key caching protocols

CWDP-302 Certified Wireless Design Professional Exam Set 4

Why does a frame transmitted at 1 Mbps have a greater usable range than the same frame transmitted at 54 Mbps?


Options are :

  • Receiver sensitivity requirements are lower for frames transmitted with less complex modulation and coding.
  • Lower data rate RF transmissions travel at higher speeds and are less likely to experience collisions.
  • Free space path loss causes greater signal dispersion for higher rate transmissions.
  • To improve reliability, 802.11 STAs increase transmit power as the signaling rate decreases.

Answer : Receiver sensitivity requirements are lower for frames transmitted with less complex modulation and coding.

Given: You are evaluating the theoretical and real-world RF gain benefits of transmit and receive features introduced by 802.11 with MIMO. This exercise allows you to quantify the feature's value in a real-world environment.What is the maximum theoretical signal gain of chip-based TxBF and MRC (as features) when compared to the same AP using only a single antenna for transmit and receive (effectively simulating a 1x1 chip)?


Options are :

  • 2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = approx 5 dBi gain 4 Rx or Tx chains = 6 dBi gain
  • 2 Rx or Tx chains = 1 dBi gain 3 Rx or Tx chains = 2 dBi gain 4 Rx or Tx chains = 3 dBi gain
  • 2 Rx or Tx chains = approx 4-6.5 dBi gain 3 Rx or Tx chains = approx 7-10 dBi gain 4 Rx or Tx chains = approx 10-12 dBi gain
  • 2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = 6 dBi gain 4 Rx or Tx chains = 9 dBi gain

Answer : 2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = approx 5 dBi gain 4 Rx or Tx chains = 6 dBi gain

An associated STA detects a new BSS with the same SSID as the STA's current BSS. The new BSS uses a different IP subnet than the current BSS. If the STA is configured to use 802.1X/EAP preauthentication, what is likely to occur?


Options are :

  • The STA will not attempt to preauthenticate because the new BSS uses a different IP subnet.
  • The STA will attempt to preauthenticate and succeed if DHCP is supported on the new subnet.
  • The STA will attempt to preauthenticate and succeed if IP Mobility is enabled on the AP or WLAN controller.
  • The STA will attempt to preauthenticate, but fail because the new BSS uses a different data-link broadcast domain.

Answer : The STA will attempt to preauthenticate, but fail because the new BSS uses a different data-link broadcast domain.

CWDP-302 Certified Wireless Design Professional Exam Set 5

Given: For this fill-in the blank question, each answer option contains an answer for the first and second blanks, separated by a dash ??. Choose the answer option that correctly fills in both blanks in the following sentence.A WLAN may use 802.11 admission control to ________, and admission control requirements are configured separately for each ________.


Options are :

  • Mark ingress and egress frames with priority values TCP/IP port
  • Regulate the available bandwidth resources Access Category
  • Identify voice-enabled wireless devices AP radio (that is, 2.4 GHz or 5 GHz)
  • Block stations with inadequate security parameters SSID

Answer : Regulate the available bandwidth resources Access Category

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?


Options are :

  • 20 mW
  • 14 mW
  • 25 mW
  • 10 mW

Answer : 25 mW

What is the purpose of DHCP Option 43, and how is it used with WLANs?


Options are :

  • 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.
  • 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 longterm IP address leases that are centrally managed with DHCP.
  • 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.
  • 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.

Answer : 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.

What is a valid 40 MHz channel configuration in the 2.4 GHz ISM band where channels 1-11 are permitted?


Options are :

  • 4 (primary), +1 (secondary)
  • 8 (primary), +1 (secondary)
  • 1 (primary), 6 (secondary)
  • 2 (primary), -1 (secondary)

Answer : 4 (primary), +1 (secondary)

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


Options are :

  • The router between the APs and the controller must be made aware of the APs as forwarding client STAs.
  • 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.
  • Centralized control functions, such as key management and distribution, RRM, and load balancing will no longer be supported.
  • APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.

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

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