Cisco 640-722 Online Practice Questions and Exam Preparation

Cisco 640-722 Online Questions & Answers

• Question 51:

  You are configuring SNMPv1/v2c on a WLC. What should you do for improved security?

  A. Remove the default SNMPv1 community.
  B. Remove the default SNMPv1 and SNMPv2 communities.
  C. Remove the default SNMPv2 community.
  D. Remove the default SNMPv3 users.
  B. Remove the default SNMPv1 and SNMPv2 communities.

  ---

  The controller has commonly known default values of "public" and "private" for the read-only and read-write SNMP community strings. Using these standard values presents a security risk. If you use the default community names, and since these are known, the community names could be used to communicate to the controller using SNMP. Therefore, we strongly advise that you change these values.

  

• Question 52:

  Which two actions are best for deploying VoWLAN on a wireless network? (Choose two.)

  A. Minimize the use of Class 3 Bluetooth devices.
  B. Minimize the use of analog cameras.
  C. Minimize the use of IP cameras.
  D. Maximize client access by enabling all data rates used by clients.
  E. Maximize client access by enabling only a few high data rates used by clients.
  B. Minimize the use of analog cameras.
  E. Maximize client access by enabling only a few high data rates used by clients.

  ---

  Analog cameras can operate in the same frequency of the wireless network, causing interference. The goal in setting the data rates for the VoWLAN network is to match the data rates of VoWLAN handsets as closely as possible, enabling a few high data rates used by the clients.

  Reference: http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Mobility/emob41dg/emob41dg-wrapper/ch9_Voic.html

• Question 53:

  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
  A. monitor

  ---

  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.

• Question 54:

  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
  D. 10.74

  ---

  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

• Question 55:

  Which command path correctly describes how to access and troubleshoot clients with Cisco WCS version 7.0?

  A. Tools > Clients > select displayed client's MAC address
  B. Tools > Clients > enter client's MAC address
  C. Monitor > Clients > click displayed client's MAC address
  D. Monitor > Clients > enter client's MAC address
  C. Monitor > Clients > click displayed client's MAC address

  ---

  Choose Monitor > Clients and Users to view both wired and wireless clients information. The Clients and Users page appears.

  

  The Clients and Users table displays a few columns by default. If you want display the additional columns that are available, click , and then click Columns. The available columns appear. Select the columns that you want to show in the

  Clients and Users table. When you click anywhere in a row, the row is selected and the client details are shown.

  The following columns are available in the Clients and Users table:

  MAC Address -- Client MAC address.

  IP Address -- Client IP address.

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/prime_infrastructure/1-2/configuration/guide/pi_12_cg/clientmgmt.html

• Question 56:

  A customer wants to deploy Cisco Cloud Wireless architecture with 802.11ac capabilities.

  Which access points would meet the customers' requirements? (Choose two.)

  A. Cisco 3700 Access Points
  B. Cisco MR34 Access Points
  C. Cisco MR18 Access Points
  D. Cisco 3600 Access Points
  E. Cisco MR72 Access Points
  F. Cisco 1570 Access Points
  G. Cisco MR26 Access Points
  B. Cisco MR34 Access Points
  E. Cisco MR72 Access Points

• Question 57:

  Which device divides a signal between two antennas?

  A. splitter
  B. lightening arrestor
  C. attenuator
  D. amplifier
  A. splitter

  ---

  A splitter causes insertion loss and divides available power between two antennas.

• Question 58:

  How can you protect the configuration file from eavesdropping, when uploading from a Cisco WLC?

  A. Use the Configuration File Encryption option.
  B. Choose an SCP as the transfer method.
  C. Connect to the Cisco WLC by using HTTPS.
  D. Connect to the Cisco WLC by using SSH.
  A. Use the Configuration File Encryption option.

  ---

  Uploading the Configuration Files (GUI) Reference: http://www.cisco.com/c/en/us/td/docs/wireless/controller/7-3/configuration/guide/b_cg73/b_wlc-cg_chapter_01010.html

  

• Question 59:

  How does an LWAP receive a configuration file?

  A. It is configured manually.
  B. It receives a configuration from the controller.
  C. It automatically ships with a configuration.
  D. It receives a configuration from a TFTP server.
  B. It receives a configuration from the controller.

  ---

  You can use an upgrade conversion tool to convert autonomous Cisco Aironet 1100, 1130AG, 1200, 1240AG, and 1300 Series Access Points to lightweight mode. When you upgrade one of these access points to lightweight mode, the access point communicates with a controller and receives a configuration and software image from the controller.

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/controller/5-2/configuration/guide/Controller52CG/c52lwap.html

• Question 60:

  When using DHCP option 43, the discovery option supports vendor specific identifiers in order to obtain what IP address?

  A. core router's gateway
  B. closest distribution switch
  C. local WLAN controller
  D. local Radius Server
  C. local WLAN controller