Cisco 640-722 Online Practice Questions and Exam Preparation

Cisco 640-722 Online Questions & Answers

• Question 21:

  Which option best describes the limitation of a client that is attempting to manage a WLC while using the client wireless adapter connection to the wireless infrastructure?

  A. Controllers must be managed using only secure protocols (that is, SSH and HTTPS), not nonsecure protocols (that is, HTTP and Telnet).
  B. Read-write access is not available; only read-only access is supported.
  C. Uploads and downloads from the controller are not allowed.
  D. Wireless clients can manage other controllers, but not the same controller and the AP to which the client is associated.
  C. Uploads and downloads from the controller are not allowed.

  ---

  The Cisco WLAN Solution Management over Wireless feature allows Cisco WLAN Solution operators to monitor and configure local WLCs using a wireless client. This feature is supported for all management tasks, except uploads to and downloads from (transfers to and from) the WLC.

  Reference: http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/69561-wlc-faq.html

• Question 22:

  Which wireless client attempts to authenticate by using 802.1X?

  A. supplicant
  B. authenticator
  C. EAP
  D. RADIUS
  A. supplicant

  ---

  802.1x is an Institute of Electrical and Electronics Engineers (IEEE) standard that provides an authentication framework for WLANs. 802.1x uses the Extensible Authentication Protocol (EAP) to exchange messages during the authentication

  process. The authentication protocols that operate inside the 802.1x framework that are suitable for wireless networks include EAP-Transport Layer Security (EAP-TLS), Protected EAP (PEAP), and EAP-Tunneled TLS (EAP-TTLS). These

  protocols allow the network to authenticate the client while also allowing the client to authenticate the network.

  802.1x authentication consists of three components:

  

  The supplicant, or client, is the device attempting to gain access to the network. You can configure the Arubauser-centric network to support 802.1x authentication for wired users as well as wireless users.

  

  The authenticator is the gatekeeper to the network and permits or denies access to the supplicants.

  

  The Arubacontroller acts as the authenticator, relaying information between the authentication server and supplicant. The EAP type must be consistent between the authentication server and supplicant and is transparent to the controller.

  Reference: http://www.arubanetworks.com/techdocs/ArubaOS_60/UserGuide/802.1x.php

• Question 23:

  Which two factors must be considered when evaluating an RF interferer for severity? (Choose two.)

  A. distance from the AP
  B. dBm
  C. the type of security crack being used
  D. duty cycle
  E. number of interfering IP stations in the cell
  F. duplicate SSID
  B. dBm
  D. duty cycle

  ---

  On controller code 7.0 and later, you can configure Event Driven RRM (EDRRM) from the Wireless > 802.11a/n [802.11b/g/n] > RRM > DCA page. Enabling EDRRM allows the controller to bypass the 600-second default interval for DCA and change an AP channel immediately if a disturbing non-802.11 interference is detected on the AP channel. You can set the sensitivity threshold to High (60), Medium (50), or Low (35). This threshold refers to the Air Quality index. CleanAircapable APs (3500 and 3600 Series APs, with their CleanAir capable chipset) can detect and identify non-802.11 interferences and report them to the controller. These APs can report interferers when in local mode and monitor mode. Notice that the AP cannot report to the controller when in Spectrum Only Monitor Mode (SOMM). The controller uses the reported information to list non-802.11 interferers along with their zone of impact and severity and establish an Air Quality Index (AQI) from 100 (perfect) to 0 (network unusable). Notice that the logic of the global AQ index (higher is better) is exactly the opposite of the logic of the individual interferer severity index (higher is more severe, and therefore worse). The severity index is calculated individually by each detecting AP based on the power (signal strength), duty cycle (how often the device uses the air per second), and detected type of interferer. The louder an interferer device, the higher the duty cycle will mean a higher severity index for the reporting AP. The severity index is calculated for a specific device, without regard to what channels are being affected.

  Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 59

• Question 24:

  DRAG DROP

  Drag the 802.11 functional responsibility in the Cisco “Split MAC” design from the left and drop it on a platform on the right.

  Select and Place:

  

  

• Question 25:

  Which Cisco program for WLAN client vendors helps to ensure that their devices are interoperable with Cisco WLAN infrastructure?

  A. CCX
  B. CCMP
  C. ASDM
  D. WLSE
  A. CCX

  ---

  IEEE and industry standards define how a Wi-Fi radio interoperates with a wireless LAN infrastructure, and the Wi-Fi CERTIFIEDTM seal ensures interoperability. For many organizations that rely on mobile computers, however, Wi-Fi CERTIFIED is not enough. These organizations need assurance that their mobile computers will interoperate with a Cisco wireless LAN infrastructure and support Cisco wireless LAN innovations for enhanced security, mobility, quality of service, and network management. The Cisco Compatible seal gives organizations the assurance that they seek. A mobile computer earns the Cisco Compatible seal through a program called Cisco Compatible Extensions, or CCX. Like the Wi-Fi certification program, CCX:

  

  Includes a specification that defines a set of features that must be implemented in the hardware and software for a Wi-Fi radio or a device that uses a Wi-Fi radio.

  

  Requires compliance testing conducted by an independent lab that is approved by the organization that manages the program.

  

  Requires that a submitted radio or device pass all tests to be approved.

  

  The CCX specification is a superset of that used for Wi-Fi certification. In fact, a device cannot be certified for CCX unless it, or the Wi-Fi radio inside it, is Wi-Fi CERTIFIED.

  Reference: http://www.digikey.com/Web%20Export/Supplier%20Content/Laird_776/PDF/laird-wireless-value-cisco-compatible-extenstion.pdf?redirected=1

• Question 26:

  DRAG DROP

  Drag the features that are associated with Cisco Compatible Extensions Lite from the left and drop them in the appropriate category on the right.

  Select and Place:

  

  

• Question 27:

  Which three AP modes of operation allow for the wIPS sub mode? (Choose three.)

  A. local mode
  B. bridge mode
  C. monitor mode
  D. H-REAP mode
  E. rogue detector mode
  F. SE-Connect mode
  G. sniffer mode
  A. local mode
  C. monitor mode
  D. H-REAP mode

  ---

  Only Cisco Aironet 1130, 1140, 1240, 1250, 3502E and 3502I Series Access Points support wIPS monitor mode.

  

  The wIPS sub mode is supported only when access point mode is Monitor, Local or HREAP. But for 1130 and 1240 access points, wIPS is supported only in Monitor Mode. Reference: http://www.cisco.com/c/en/us/td/docs/wireless/mse/3350/7-0MR1/wIPS/configuration/guide/wIPS_70MR1/msecg7x_ch6_wIPS.html

• Question 28:

  Which option is needed to earn the Cisco Compatible credential for Cisco Compatible Extensions Lite?

  A. Foundation and Management are required.
  B. Location and Management are required.
  C. Foundation and Location are required.
  D. Foundation and Voice are required.
  E. Voice is required.
  F. Foundation is required.
  G. Location is required.
  H. Management is required.
  F. Foundation is required.

  ---

  Historically, there have been five versions of the Cisco Compatible Extension (CCX) specification labeled Version 1(V1) to Version 5(V5). Each version built upon its predecessors. For example, CCXv5 added MFP, real-time reporting between

  client and AP, a diagnostic channel to help troubleshooting clients and optional location services, and improved several CCXv4 features. Each version contains a list of features. In summer 2011, Cisco separated the CCX features into four

  subfamilies to help vendors integrate only those features that are needed for their specific wireless clients (called application-specific devices, which are devices built for a specific function [for example, barcode scanners or VoWLAN phones]

  and therefore do not need all the CCX features that a data laptop would need).

  This is called the CCX Lite program, with four components:

  

  Foundation (for standard CCX features for connectivity and security)

  

  CCX Voice (for VoWLAN-specific features, such as QoS enhancements)

  

  Location

  

  Management (for connection reporting and troubleshooting)

  

  Foundation is always needed to be certified CCX Lite, but the other subfamilies are optional.

  Reference: CCNA Wireless (640-722 IUWNE) Quick Reference Guide page 78

• Question 29:

  What is an MBSSID?

  A. a virtual AP configured on a physical AP that share a single physical device, which is one half-duplex radio
  B. a set of physical APs configured in a BSA to form cells that are controlled by a single controller
  C. the group of clients that are allowed to gain access to one or more SSIDs configured in an AP
  D. the identified overlap area between two cells, which identifies the clients that are operating in that area at any given time
  A. a virtual AP configured on a physical AP that share a single physical device, which is one half-duplex radio

  ---

  Some APs can offer only one SSID per radio. Other APs have a slot of MAC addresses available and can support several SSIDs per radio, using Multiple BSSIDs (MBSSID). MBSSIDs basically are virtual APs that still share the same physical device, which has a half-duplex radio. MBSSIDs are a way to differentiate the traffic reaching the AP, not a way to increase the capacity of the AP.

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

• Question 30:

  Which protocol is used for Cisco WCS to communicate with Cisco WLC?

  A. SNMP
  B. CAPWAP
  C. HTTPS
  D. SSH
  A. SNMP

  ---

  WCS simplifies controller configuration and monitoring and reduces data entry errors. WCS uses the industry-standard SNMP protocol to communicate with the controllers. WCS also includes the Floor Plan editor which allows you to do the following:

  

  Vectorize bitmapped campus, floor plan, and outdoor area maps.

  

  Add and change wall types.

  

  Import the vector wall format maps into the database.