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Latest and Most Accurate Cisco 400-351 Dumps Exam Questions and Answers:

Version: 15.0
Question: 21

On a Cisco autonomous AP, the maximum number of attempts to send a packet (packet retries) is set to 32 by default. Which statement about the result when the AP has tried to send a packet for that number of attempts and no response is received from the client is true?

A. The access point drops the packet.
B. The client MAC address is excluded for 60 seconds.
C. The access point resets the radio interface.
D. The access point disassociates the client.

Answer: A

Explanation:
From:
Packet Retries & Max-Retries I mrn-cciew
Packet Retries & Max-Retries
In Autonomous(IOS) AP, you can configure number of attempts the wireless device makes to send a packet before giving up & dropping the packet. There are two ways of configuring this feature. One method for best effort (priority value 0) traffic & another method for non-best effort (priority value 1-7)
1. Best-effort Traffic (packet retries command)
2. N on-Best-effort Traffic (packet max-retries command )
CLI default:
packet retries 32 drop-packet
channel width 40-above
channel dfs station-role
root rts retries 32
cfg:
http://www.cisco.com/c/en/us/td/docs/wireless/access_point/15-3-3/configuration/guide/cg15-3-3/cg15-3-3-chap6-radio.html
Configuring the Maximum Data Packet Retries
The maximum data retries setting determines the number of attempts the makes to send a packet before giving up and dropping the packet. The default setting is 32. Beginning in privileged EXEC mode

Question: 22

Which feature intersection of a Cisco 5760 Wireless LAN Controller with HA AP SSO is not true?

A. Switchover during AP preimage download causes the Aps to start image download all over again from the new active controller.
B. Upon guest anchor controller switchover, mobility tunnels stay active, Aps remain connected, clients rejoin at MA or MC, and clients are anchored on the new active controller.
C. WIPS information is synced to the standby unit. The standby unit does not have to relean wIPS information upon switchover.
D. Roamed clients that have their data path going through the mobility tunnel endpoint “becomed Local” in case of Layer 2 with sticky anchoring and Layer 3 roam. Layer 2 roamed clients are not affected except when roaming occurs between Cisco Unified Wireless Network and CA controller.

Answer: C

Question: 23

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You are getting the following error message. Which reason for this issue true?
%DOT11-4-CANT_ASSOC Interface Dot 11 Radio0. Cannot associate NO Aironet Extension IE.

A. “dot11 extension ” is missing under the interface Dot11Radio 0 interface.
B. When repeater mode is used, unicast-flooding must be enabled to allow Aironet IE communications.
C. The parent AP MAC address has not been defined.
D. Repeater mode only works between Cisco access point.

Answer: A

Explanation:

http://www.cisco.com/c/en/us/td/docs/wireless/access_point/12-2_11_JA/configuration/guide/b12211sc/s11rep.html

Question: 24

You have received a new Cisco 5760 Controller and have gone through the initial startup wizard. You are now trying to add APs to the controller, but these are not joining.
Which three checks should you do next? (Choose three.)

A. Check that the radios are not in a shutdown state.
B. Check the country code of the controller. The APs do not join the controller if the country code does not match.
C. Check that the correct time is set on the controller.
D. Check that option 53 has been set in the DHCP scope.
E. Check that the controller has enough AP licenses.
F. Check that the controller has been configured with the correct hostname. Otherwise, DNS resolution fails.

Answer: BCE

Question: 25

You are installing Converged Access controllers that run Cisco IOS-XE and you are ready to implement QoS. From the below, choose all the possible QoS target levels that would apply to downstream traffic (toward the client)?

A. Client, SSID, Radio, Port
B. Client, SSID, Radio
C. Client, Radio
D. Client, SSID

Answer: A

Explanation:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3850/software/release/3.2_0_se/multibook/configuration_guide/b_consolidated_config_guide_3850_chapter_010010.html

Question: 26

Which memchanism incorporates the channel capacity into the CAC determination and gives a much more accurate assessment of the current call carrying capacity of the AP?

A. Static CAC.
B. Reserved roaming bandwidth(%).
C. Expedited bandwidth.
D. Metrics collection.
E. Load-based AC.
F. Max RF bandwidth (%).
G. Admission control.

Answer: E