Cisco 640-722 Online Practice Questions and Exam Preparation

Cisco 640-722 Online Questions & Answers

• Question 231:

  DRAG DROP

  Drag the Cisco WCS report from the left and drop it on the category it reports on to the right.

  Select and Place:

  

  

• Question 232:

  DRAG DROP Cisco WLCs running version 7.0 can be enabled for CleanAir functionality by using an AQI rating from 1 to 100. Event-driven RRM can take immediate action on AQI levels based on three sensitivity thresholds (Low, Medium, High), which are configurable in the web-based GUI. The network administrator must understand what AQI value is set using these sensitivity thresholds in version 7.0. Drag the AQI values on the left and drop them on the threshold name they belong to on the right.

  Select and Place:

  

  

• Question 233:

  What two AP configurations will show RF prediction on maps in WCS? (Choose two.)

  A. Lightweight APs with internal antennas
  B. Lightweight APs with external Cisco antennas
  C. Lightweight APs with external 3rd Party antennas
  D. Autonomous APs with internal antennas
  E. Autonomous APs with external Cisco antennas
  F. Autonomous APs with external 3rd Party antennas
  A. Lightweight APs with internal antennas
  B. Lightweight APs with external Cisco antennas

• Question 234:

  Which description best describes upfade in a multipath environment?

  A. In this situation, multiple signal paths are not sent at exactly the same time. The receiver receives a positive crest on the primary signal and a negative crest on the secondary signal.
  B. In this situation, the multiple signal paths are distorted and difficult to understand.
  C. In this situation, the multiple signal paths are weaker than they should be because the signals are out of phase with each other.
  D. In this situation, the signal is stronger than it should be because multiple signal paths are received twice at exactly the same time, which results in the multiple signals being in-phase.
  D. In this situation, the signal is stronger than it should be because multiple signal paths are received twice at exactly the same time, which results in the multiple signals being in-phase.

  ---

  If a signal is received twice at exactly the same time, the secondary wave adds its power to the primary wave, so the receiver gets twice the positive energy (positive crest) at the same instant, then twice the negative energy (negative crest) at the same instant. The result is that both waves add up to twice the amplitude (energy) of a single wave, and both signals are said to be in phase (both signals are said to have an angle of 0 degrees). This rare condition is called upfade. If the second signal negative energy (negative crest) reaches the receiver just when the first signal positive energy (positive crest) also reaches the receiver, both signals can cancel each other, resulting in no signal at all (this is the principle used in noise cancellation headsets).

  Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 10

• Question 235:

  Which statement about the impact of configuring a single SSID to support TKIP and AES encryption simultaneously is true?

  A. The overhead associated with supporting both encryption methods significantly degrades client throughput.
  B. Some wireless client drivers might not handle complex SSID settings and may be unable to associate to the WLAN.
  C. This configuration is unsupported and the Cisco Wireless Control System generates alarms continuously until the configuration is corrected.
  D. This configuration is common for migrating from WPA to WPA2. No problem is associated with using this configuration.
  B. Some wireless client drivers might not handle complex SSID settings and may be unable to associate to the WLAN.

  ---

  AES encryption uses hardware so there is almost no overhead when using it. TKIP is based on software. So when we support both TKIP and AES the client throughput will not significantly degrade -> A is not correct. When choosing both AES and TKIP, the router will support both encryption algorithms. Because not all wireless NICs support AES, some only support TKIP, so this option is probably the best choice -> B is not correct. As the picture below, Cisco Wireless Control System does support both simultaneously -> C is not correct.

  

• Question 236:

  Which two of the following authentication methods used for WiFi security require the use of certificates? (Choose two.)

  A. PEAP
  B. EAP-FAST
  C. WPA2
  D. WPA1
  E. EAP-TLS
  F. EAP-MD5
  A. PEAP
  E. EAP-TLS

  ---

  When you use EAP with a strong EAP type, such as TLS with smart cards or TLS with certificates, both the client and the server use certificates to verify their identities to each other. Certificates must meet specific requirements both on the server and on the client for successful authentication.

  Reference: https://support.microsoft.com/en-us/kb/814394

• Question 237:

  You are sitting in an airport preparing to use a free WLAN. When you look at the connections in your Windows 7 wireless client, you see a network name and three boxes with a yellow shield. What does this mean?

  A. You cannot connect to this WLAN.
  B. An open ad hoc network is nearby.
  C. The WLAN in the airport is open.
  D. A secure ad hoc network is nearby.
  E. A secure WLAN is in the airport.
  F. You must provide a username and password to access the WLAN in the airport.
  B. An open ad hoc network is nearby.

  ---

  You can connect to a detected network by clicking the wireless connection icon in the status bar, clicking an SSID name (the signal strength of the associated AP is represented by green bars, five bars representing the best signal; an exclamation mark inside a yellow shield is displayed if the SSID has no security [Open authentication, no encryption]), clicking Connect and completing the security parameters when applicable.

  Reference: http://www.ciscopress.com/articles/article.asp?p=2131139

• Question 238:

  What three components are required to configure Mobility Group Members between Wireless LAN Controllers? (Choose three.)

  A. Controller Management IP Address
  B. Controller Virtual IP Address
  C. Controller Multicast IP Address
  D. Controller MAC Address
  E. Controller Mobility Group Name
  F. Controller AP Management IP Address
  G. Controller RF Group Name
  A. Controller Management IP Address
  D. Controller MAC Address
  E. Controller Mobility Group Name

• Question 239:

  Which Cisco AnyConnect module allows troubleshooting for core Cisco AnyConnect problems?

  A. telemetry
  B. web security
  C. VPN
  D. NAM
  E. DART
  F. posture
  G. CSSC
  E. DART

  ---

  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.

  Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 74

• Question 240:

  Refer to the exhibit.

  

  An engineer wants to setup a mobility anchor for the Guest WLAN, but does not see the Anchor IP address listed in the drop-down. What is the most likely cause of this problem?

  A. The mobility anchor is currently unreachable.
  B. The mobility anchor must also be included in the mobility group of the WLC.
  C. Layer 3 Security must be configured for Web Policy Authentication.
  D. The mobility anchor is attached to another WLAN.
  E. Layer 3 Security must be configured for Web Policy Passthrough.
  B. The mobility anchor must also be included in the mobility group of the WLC.