Get all latest (August) Cisco 640-722 Actual Test 141-150

Ensurepass

 

QUESTION 141

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.

 

Correct Answer: B

 

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QUESTION 142

Which Extensible Authentication Protocol types are supported by the Cisco Unified Wireless Network?

 

A.

EAP-TLS, PEAP-MSCHAPv2, and PEAP-GTC only

B.

LEAP and EAP-FAST only

C.

EAP-TLS, PEAP-MSCHAPv2, PEAP-GTC, LEAP, and EAP-FAST only

D.

any EAP supported by the RADIUS authentication server

 

Correct Answer: D

 

 

 

 

< p class="MsoNormal" style="cursor: auto; margin: 0cm 0cm 0pt; line-height: normal; text-autospace: ; mso-layout-grid-align: none" align="left">QUESTION 143

In a typical wireless network using WPA, WPA2 or VPN, why is it still possible for a rogue client to launch a DOS attack?

 

A.

WPA and WPA2 are not considered strong encryption algorithms and are easily cracked.

B.

802.11 management frames are easily compromised.

C.

Cisco Compatible Extensions v5 are required with WPA, WPA2, or VPN to keep rogues from launching attacks in the wireless network.

D.

The message integrity check frames are never encrypted or authenticated, which allows rogues to spoof clients.

 

Correct Answer: B

 

 

QUESTION 144

Which method of encryption does the 802.11i standard use?

 

A.

AES/CCMP

B.

AES/ECB

C.

AES/OCB

D.

TKIP

E.

both AES/ECB and AES/CCMP

 

Correct Answer: A

 

 

QUESTION 145

What is the impact of configuring a single SSID to support TKIP and AES encryption simultaneously?

 

A.

The overhead associated with supporting both encryption methods degrades client throughput significantly.

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.

 

Correct Answer: B

 

 

QUESTION 146

Which two types of encryption does Windows support for WPA2 security for wireless connections? (Choose two.)

 

A.

AES

B.

DES

C.

PGP

D.

TKIP

E.

WEP

 

Correct Answer: AD

QUESTION 147

When a guest client is authenticated, which type of connection is created between the controller-based AP and the client?

 

A.

as SSL connection

B.

a TLS encrypted tunnel

C.

an unsecured connection

D.

a 802.1x/EAP tunnel

E.

an IPsec tunnel

 

Correct Answer: C

 

 

QUESTION 148

When the enterprise-based authentication method is used for WPA2, a bidirectional handshake exchange occurs between the client and the authenticator. Which five options are results of that exchange being used on a controller-based network? (Choose five.)

 

A.

a bidirectional exchange of a nonce used for key generation

B.

binding of a Pairwise Master Key at the client and the controller

C.

creation of the Pairwise Transient Key

D.

distribution of the Group Transient Key

E.

distribution of the Pairwise Master key for caching at the access point

F.

proof that each side is alive

 

Correct Answer: ABCDF

 

 

QUESTION 149

When the pre-shared key authentication method is used for WPA or WPA2, for which two functions is the pre-shared key used? (Choose two.)

 

A.

to act as the Group Transient Key during the bidirectional handshake

B.

to act as the Pairwise Master Key during the bidirectional handshake

C.

to derive the nonce at each side of the exchange

D.

to derive the Pairwise Transient Key

 

Correct Answer: BD

 

 

QUESTION 150

Which encryption algorithm does WPA use?

 

A.

RC4

B.

DES

C.

AES

D.

DH5

 

Correct Answer: A

 

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