Question 1

Which of the following are weaknesses of MAC address filtering? (Choose all that apply.)
A) only Windows uses MAC addresses,excluding other OSs from this method
B) MAC addresses can be spoofed
C) the MAC address can be captured by forcing a reassociation
D) MAC address management can be difficult

Accepted Answer

MAC addresses can be spoofed, making MAC address filtering a less secure method. Attackers can capture MAC addresses by forcing a device to reassociate, thereby obtaining the MAC address. Managing a list of allowed MAC addresses can become cumbersome, especially in environments with many devices.

Question 2

Briefly define cryptography.

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Question 3

Describe one weakness of MAC address filtering.

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Question 4

What is a distributed attack?

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Question 5

Describe how an attacker can hijack a wireless connection.

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Question 6

Describe the five steps in the process of WEP encryption.

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Question 7

List and describe the three characteristics of information that must be protected by information security?

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Question 8

The three protections that must be extended over information can be described by the acronym ________.

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Question 9

Describe three limitations of SSID hiding.

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Question 10

How have WLANs changed 'hard edges' into 'blurred edges'?

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The answer of How have WLANs changed 'hard edges' into...

Question 11

Which of the following are difficulties faced in defending attacks? (Choose all that apply.)
A) universally connected devices
B) operating system vendor's lack of concern about security
C) increased speed of attacks
D) attacks that are more complex

Accepted Answer

Universal connectivity means that more devices can be targeted, which increases the vulnerability of networks. The speed at which attacks happen and their complexity also make it difficult to defend against them. While knowing a vendor's lack of security concern may be helpful, it is not necessarily a difficulty faced in defending attacks.

Question 12

____________________ ensures that no unauthorized person or software has altered the information.

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Question 13

Plaintext data is input into an encryption _________,which consists of procedures based on a mathematical formula used to encrypt the data.

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Question 14

Which of the following are among the 802.11 cryptography objectives? (Choose all that apply.)
A) efficient
B) self-synchronizing
C) mandatory
D) exclusive

Accepted Answer

The 802.11 cryptography objectives include providing efficient and self-synchronizing encryption mechanisms for wireless networks. However, mandatory and exclusive are not among the cryptography objectives.

Question 15

WEP protects _______________ by scrambling the wireless data as it is transmitted.

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Question 16

Describe open system authentication.

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Question 17

Wireless access control is intended to limit a user's admission to the _______.

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Question 18

What three categories can the protections implemented in the original 802.11 standard be divided into? (Choose three.)
A) access control
B) MAC address filtering
C) wired equivalent privacy
D) authentication

Accepted Answer

The three categories of protections implemented in the original 802.11 standard are access control, wired equivalent privacy, and authentication. MAC address filtering was not a protection implemented in the original standard.

Question 19

Describe war driving.

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Question 20

Match between columns
                        Premises: an imposter AP that is set up by an attacker
granting or denying approval to use specific resources
a DoS attack that floods the RF spectrum with extraneous RF signal "noise" that prevents communications from occurring
an attack that makes it appear that the wireless device and the network computers are communicating with each other
cryptographic keys that create a repeating pattern
the output from a pseudo-random number generator (PRNG)
an attack that attempts to prevent a device from performing its normal functions
data input into an encryption algorithm
the process of changing ciphertext into plaintext
data that has been encrypted

Accepted Answer

The Answer of RF jamming and weak keys and keystream is...

Quiz 9: Wireless LAN Security Vulnerabilities

Which of the following are weaknesses of MAC address filtering? (Choose all that apply.)