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2021 Nov CWDP-302 exam guide
Q11. When selecting a centralized WLAN architecture, what new problem may arise when you change the data forwarding model from centralized to distributed?
A. APs that were designed for a centralized forwarding model may not support all features in distributed forwarding mode.
B. The router between the APs and the controller must be made aware of the APs as forwarding client STAs.
C. 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.
D. Centralized control functions, such as key management and distribution, RRM, and load balancing will no longer be supported.
Answer: A
Q12. Of the following antenna connector types, which one is the smallest?
A. RP-TNC
B. MC Connector
C. N Connector
D. Male N Connector
Answer: B
Q13. 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.
Answer: A
Q14. 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
A. 0 dBm = 1 mW
B. mW
C.
D. mW mW
Answer: A
Q15. 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’saddress should be drawn from.
Answer: C
Updated CWDP-302 actual test:
Q16. 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)?
A. 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
B. 2 Rx or Tx chains = 1 dBi gain 3 Rx or Tx chains = 2 dBi gain 4 Rx or Tx chains = 3 dBi gain
C. 2 Rx or Tx chains = 3 dBi gain 3 Rx or Tx chains = 6 dBi gain 4 Rx or Tx chains = 9 dBi gain
D. 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
Answer: A
Q17. During a post-deployment verification, you are requested to troubleshoot an area where users are experiencing poor throughput. They are using data communication only, mainly from laptops. You captured the frame showing an incorrect FCS. This frame is typical of those thatwere captured by the analyzer.
What does this frame reveal about the RF network in this area?
A. One station seems to be streaming video, thus may have reserved significant bandwidth via admission control
B. Contention Free is in place in this network, which may starve some non-QoS stations from access
C. Multipath or excessive collisions seem to be an issue in this area
D. The AP seems to be too far to provide enough coverage to this area
Answer: C
Q18. Excessive uplink RTP frame retransmissions can result in ____________.
A. Deauthentication of the transmitter by the receiver
B. Lowering of the data transmission rate by the transmitting station
C. MOS scores in excess of 5
D. Head-of-Line blocking at the receiver
Answer: B
Q19. 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 thelayer-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-3Ethernet 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 priority tag value by the WLAN controller.
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 VLAN tag by the access point.
Answer: A
Q20. 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?
A. Yagi
B. Omni
C. Patch
D. Panel
Answer: A