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2021 Jun ccna wireless 640-722 iuwne quick reference:
Q141. - (Topic 6)
A network engineer is troubleshooting a LAP that is unable to join the controller and receives the message below:
LWAPP_CLIENT_ERROR_DEBUG. No more AP manager IP addresses remain.
What does the log indicate?
A. Two or more LAPs have the same IP address.
B. An AP manager has the same IP address as another AP manager.
C. A LAP has the same IP address as the AP manager.
D. Two or more controllers have the same IP address.
Answer: C
Explanation:
Problem 13: Duplicate IP address in the network
This is another common issue that is seen when the AP tries to join the WLC. You might see this error message when the AP tries to join the controller.
No more AP manager IP addresses remain
One of the reasons for this error message is when there is a duplicate IP address on the network that matches the AP manager IP address. In such a case, the LAP keeps power cycling and cannot join the controller.
The debugs will show that the WLC receives LWAPP discovery requests from the APs and transmits a LWAPP discovery response to the APs. However, WLCs do not receive LWAPP join requests from the APs.
In order to troubleshoot this issue, ping the AP manager from a wired host on the same IP subnet as the AP manager. Then, check the ARP cache. If a duplicate IP address is found, remove the device with the duplicate IP address or change the IP address on the device so that it has a unique IP address on the network.
The AP can then join the WLC.
Reference: http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/99948-lap-notjoin-wlc-tshoot.html
Q142. - (Topic 1)
Which governing body analyzes the applications and environments in which wireless networks are used?
A. EIRP
B. ETSI
C. FCC
D. IEEE
E. WiFi Alliance
Answer: D
Explanation:
Hence the various wireless standards prefixed with IEEE. Wireless LANs are described in IEEE 802.11 standard that contains 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac and so forth.
Q143. - (Topic 2)
A lightweight AP has been deployed in local mode in a network that consists of 10 wireless LAN controllers in a single mobility group. The AP has been configured to use primary, secondary, and tertiary Cisco WLCs. Due to a major power failure, all those Cisco WLCs are unavailable.
Which step does the AP take next?
A. The AP reboots and repeatedly attempts to join the configured primary, secondary, and tertiary Cisco WLCs in that order. The process continues until one of the configured Cisco WLCs is available.
B. The AP attempts to join a Cisco WLC configured as a master controller.
C. The AP attempts to join the Cisco WLC that has the greatest capacity available.
D. The AP state transitions to AP Fallback Mode and continues to provide limited WLAN services (that is, no new client authentications) until a Cisco WLC is available.
Answer: B
Explanation:
. The LAP looks at the Master Controller flag field in the LWAPP discovery responses from the candidate WLCs if one of these items is true: If a WLC is configured as a Master Controller, the LAP selects that WLC and sends it an LWAPP join request.
Reference: http://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/70333-lap-registration.html
Q144. - (Topic 1)
Which spread spectrum technique uses 11-bit chips to transmit 1 bit of data over a 22-MHz channel?
A. DSSS
B. FHSS
C. OFDM
D. MIMO
E. CCK
Answer: A
Explanation:
For every 0 or 1 you want to send, DSSS generates a code representing that 0 or that 1. This code, also called symbol or chip, can be a sequence of up to 11 bits (this is called the Barker 11 code), and these 11 bits are sent in parallel over the 22 MHz channel. You can lose up to nine of these 11 bits due to interferences and still understand whether the code sent was supposed to represent a 0 or a 1.
Reference: Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 23
Q145. DRAG DROP - (Topic 1)
Drag the characteristics on the left that are associated with the specific controller-based AP deployment mode and drop them in the appropriate category on the right.
Answer:
Regenerate cbt nuggets cisco ccna wireless iuwne 640-722:
Q146. - (Topic 3)
What is the function of the Cisco AnyConnect DART tool?
A. creates a compressed bundle of client logs and information
B. visualizes a WLAN environment, showing the possible locations of problems
C. gathers statistics from neighboring clients for comparison to the baseline
D. helps to troubleshoot a WLAN connection by using easy-to-use wizards and statistic viewers
Answer: A
Explanation:
AnyConnect offers the DART module that can be used to analyze and troubleshoot connections. The information collected by DART can be examined locally or exported and sent to a network support desk for analysis. The DART tool is able to create a bundle to log information for all the wireless clients.
Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 74
Q147. - (Topic 4)
The network administrator wants an access point to be able to find rogue APs and to support location-based services. Which AP mode meets this requirement while having the radios up and preventing client connections?
A. monitor
B. sniffer
C. rogue-detection
D. H-REAP
Answer: A
Explanation: If you have enough access points, you can even dedicate an AP to making it's only job picking up other networks, this a mode that the AP can be in and is called "Monitor Mode" to change an AP to monitor mode, navigate to the following on the WLC:
Go to Monitor Tab
Scroll down to "Access Point Summary"
Click on "Detail" next to "All AP's"
Click on the hyperlink of the AP you want to change the mode of
First page you will see "AP Mode" where you can select Monitor from
This will place the AP into a dedicated monitor mode, it will not service clients but will sit and scan for you.
Q148. - (Topic 7)
To mitigate DoS attacks on a network, what security method should be implemented?
A. WEP
B. 802.1x
C. Non-broadcast SSID
D. Client MFP
Answer: D
Q149. - (Topic 5)
A network engineer in the GUI of WCS version 7 wants to add an autonomous access point. Where can this command be found in the drop-down menu?
A. Configure > Access Point > Add Autonomous APs
B. Manage > Access Points > Add Autonomous APs
C. Administration > Access Point > Add Autonomous APs
D. Location > Access Point > Add Autonomous APs
Answer: A
Explanation:
From WCS, the following methods are available for adding autonomous access points:
. Add autonomous access points by Device information (IP addresses and credentials).
. Add autonomous access points by CSV file
Reference: http://www.cisco.com/c/en/us/td/docs/wireless/wcs/7-0/configuration/guide/WCS70cg/7_0apcfg.html#wp1054452
Q150. - (Topic 1)
If an antenna has a dBd of 8.6, what is the dBi value?
A. 6.2
B. 6.46
C. 8.6
D. 10.74
E. 12.88
Answer: D
Explanation:
Antenna performance is measured in dBi (the antennas gain/loss over a theoretical isotropic antenna) dBd (the antennas gain/loss over a dipole antenna)
dBi = dBd + 2.15
dBd = dBi – 2.15