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Exam 5: Wireless Security Models

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Question 1

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Pre-authentication allows for faster roaming between access points.

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Question 2

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How do TKIP and MIC perform encryption in the WPA personal security model?

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The steps are as follows:
* Step 1-Inste...

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WPA2 uses the Advanced Encryption Standard (AES) for data encryption but does not support IEEE 802.1x authentication or PSK technology.

The original PSK passphrase is mathematically manipulated (known as ____________________) 4,096 times before it is transmitted.

In the WPA personal security model, the wireless device has two keys, a 128-bit encryption key called the ____ key and a 64-bit MIC.

PSK passphrases of fewer than 20 characters can be subject to ____ attacks.

IEEE 802.11i includes ____, which stores information from a device on the network so if a user roams away from an AP and later returns,he does not need to re-enter all of the credentials.

WPA authentication can be accomplished by using either IEEE 802.1x or ____________________ technology.

WPA replaces the Cyclic Redundancy Check (CRC) function in WEP with the ____.

WPA replaces WEP with an encryption technology called ____________________.

____ prevents an unauthenticated device, either wired or wireless, from receiving any network traffic until its identity can be verified.

The most robust level of security that can be achieved today for wireless LANs is using the ____ model.

PSK keys are automatically changed (called ____) .

IEEE 802.11i authentication and key management is accomplished by the IEEE ____ standard.

The block cipher used in 802.11i is the ____________________.

What are some of the PSK key management weaknesses?

Encryption in 802.11i is accomplished by replacing the RC4 stream cipher algorithm with a ____.

What are the benefits of limiting the maximum number of DHCP users?

The ____ model is designed for single users or small office/home office (SOHO) settings of generally 10 or fewer wireless devices.

It is recommended that AES encryption and decryption be performed in hardware because of the computationally intensive nature of AES.