Cisco 640-722 Online Practice Questions and Exam Preparation

Cisco 640-722 Online Questions & Answers

• Question 1:

  What two access methods are enabled by default on a Cisco WLC? (Choose two.)

  A. HTTP
  B. HTTPS
  C. Telnet
  D. SSH
  E. VPN
  F. SFTP
  B. HTTPS
  D. SSH

• Question 2:

  Which calculation computes the EIRP of an antenna?

  A. EIRP = Tx power (dBm) + Antenna Gain (dBi) - Cable Loss (dB)
  B. EIRP= Cable Loss (dB)+ Antenna Gain (dBi) - Tx power (dBm)
  C. EIRP = Cable Loss (dB)+ Antenna Gain (dBi) / Tx power (dBm)
  D. EIRP = Tx power (dBm) + Antenna Gain (dBi) / Cable Loss (dB)
  E. EIRP = Antenna Gain (dBi) - Cable Loss (dB) * Tx power (dBm)
  F. EIRP = Tx power (dBm) * Antenna Gain (dBi) / Cable Loss (dB)
  A. EIRP = Tx power (dBm) + Antenna Gain (dBi) - Cable Loss (dB)

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  EIRP (Effective Isotropic Radiated Power)

  EIRP (Effective Isotropic Radiated Power) is the actual amount of signal leaving the antenna and is a value measured in db and is based on 3 values:

  a) Transmit Power (dBm)

  b) Cable Loss (dB)

  c) Antenna Gain (dBi)

  The dB measures the power of a signal as a function of its ratio to another standardized value. The abbreviation dB is often combined with other abbreviations in order to represent the values that are compared. Here are two examples:

  dBm - The dB value is compared to 1 mW.

  dBw - The dB value is compared to 1 W.

  You can calculate the power in dBs from this formula:

  Power (in dB) = 10 * log10 (Signal/Reference)

  This list defines the terms in the formula:

  log10 is logarithm base 10.

  Signal is the power of the signal (for example, 50 mW).

  Reference is the reference power (for example, 1 mW).

  How to find EIRP

  To determine EIRP follow this equation:

  - Cable Loss + Antenna Gain = EIRP

  Reference: https://supportforums.cisco.com/document/49506/snr-rssi-eirp-and-free-space-path-loss

• Question 3:

  An engineer has been noticing the power settings on several of the office APs change from day to day ever since two more APs were installed. After logging into the WLC, the engineer verifies that the power levels on 4 of the 802.11n radios are fluctuating up and down. What is the reason for this?

  A. The controller has the APs in H-REAP mode and are on a Layer 2 connection instead of Layer 3.
  B. The RRM has revealed a bad survey and is attempting to power down some of the radios to make up for it.
  C. The WLC has created temporary coverage holes while stepping through power levels for some of the APs.
  D. Several APs have high levels of overlapping coverage in the same area and the WLC is using RRM to correct the cell sizes AP coverage.
  D. Several APs have high levels of overlapping coverage in the same area and the WLC is using RRM to correct the cell sizes AP coverage.

• Question 4:

  Which two items are needed to discover the IP address of a new Cisco Aironet 1260 autonomous AP that just finished booting? (Choose two.)

  A. username = "cisco" and password = "cisco"
  B. username = "Admin" and password = "Cisco"
  C. username=Cisco and password=Cisco
  D. show int vlan1
  E. show int bvi1
  F. show int gigabitethernet0
  G. show int radio0-802.11n
  H. show int radio1-802.11n
  C. username=Cisco and password=Cisco
  E. show int bvi1

  ---

  Enter your username in the User Name field. The default username is Cisco.

  Enter the wireless device password in the Password field and press Enter. The default password is Cisco. The Summary Status page appears. The access point is configured with the factory default values including the IP address (set to

  receive an IP address using DHCP). To obtain the new IP address for an access point/bridge, you can use the show interface bvi1 CLI command.

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/access_point/12-4-25d-JA/Configuration/guide/cg_12_4_25d_JA/scg12-4-25d-JA-chap4-first.html

• Question 5:

  What is the EIRP value for a transmitter that has a transmitter capable of 15 dBm, an antenna that has a gain of 12 dBi, and a cable that connects the transmitter to the antenna that has 1 db loss?

  A. 26 dBm
  B. 100 mW
  C. .86 dBm
  D. 165 dBm
  E. 1000 mW
  A. 26 dBm

  ---

  To determine EIRP follow this equation: - Cable Loss + Antenna Gain = EIRP So in this case 15 - 1 + 12 = 26

• Question 6:

  Refer to the exhibit.

  

  How do improperly set Telnet/SSH parameters effect the configuration of a controller with Cisco WCS?

  A. The CLI and GUI management of the controller both fail because Cisco WCS checks these credentials before opening a session.
  B. The Telnet/SSH username must have sufficient privileges to execute commands in CLI templates.
  C. The GUI management of the controller fails because the Cisco WCS uses the Telnet/SSH parameters to login to the controller.
  D. The controller remains configured in the Cisco WCS, but no management is possible through GUI from other client browsers.
  B. The Telnet/SSH username must have sufficient privileges to execute commands in CLI templates.

  ---

  Enter the Telnet credentials information for the controller. If you chose the File option and added multiple controllers, the information will apply to all specified controllers. If you added controllers from a CSV file, the username and password

  information is obtained from the CSV file.

  Note: The Telnet/SSH username must have sufficient privileges to execute commands in CLI templates.

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/wcs/7-0/configuration/guide/WCS70cg/7_0ctrlcfg.html#wp1041451

• Question 7:

  Refer to the exhibit.

  

  Which menu gives you access to manage background tasks in Cisco WCS?

  A. None, because the General tab provides access to the management of background tasks
  B. Monitor
  C. Configure
  D. Services
  E. Administration
  F. Tools
  E. Administration

  ---

  The Administration menu enables you to schedule tasks like making a backup, checking a device status, auditing your network, synchronizing the MSE, and so on. It also contains Logging to enable various logging modules and specify restart requirements. For user administration such as changing passwords, establishing groups, setting application security settings, and so on, choose AAA. From the Administration Menu, you can also access the licensing information, set user preferences, and establish high availability (a secondary backup device running WCS).

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/wcs/7-0/configuration/guide/WCS70cg/7_0wst.html#wp1060607

• Question 8:

  DRAG DROP When working with alarms in Cisco WCS version 7.0, several actions can be performed on respective alarms. Common actions include “Assign to me,” “Unassign,” or “Email Notification.” However, three other action types provide similar, but important differences. Drag the alarm action names from the left and drop them on the correct corresponding definitions on the right.

  Select and Place:

  

  

• Question 9:

  Which three options relate to event-driven RRM? (Choose three.)

  A. any 802.11n AP models
  B. specific AP models
  C. minimum of AP and WLC
  D. minimum of AP, WLC, and WCS
  E. minimum of AP, WLC, WCS, and MSE
  F. configurable in WLC at 802.11b/g/n > RRM > TPC
  G. configurable in WLC at 802.11b/g/n > RRM > DCA
  B. specific AP models
  C. minimum of AP and WLC
  G. configurable in WLC at 802.11b/g/n > RRM > DCA

  ---

  

  Figure 13-2 802.11a > RRM > Dynamic Channel Assignment (DCA) Page

  Reference: http://www.cisco.com/c/en/us/td/docs/wireless/controller/7-0/configuration/guide/c70/c70cleanair.html

• Question 10:

  Refer to the exhibit.

  

  Which GUI item do you click to configure maps with APs in Cisco WCS?

  A. Configure
  B. Client
  C. CleanAir
  D. Services
  E. Administration
  F. Monitor
  F. Monitor

  ---

  The Monitor menu provides you with a top level description of the devices on your network. You can monitor your network, maps, various devices, security, alarms, events, or reports. Reference: http://www.cisco.com/c/en/us/td/docs/wireless/wcs/5-2/configuration/guide/WCS5_2cg/5_2wst.html#wp1060563