Question 1

In 802.11i ________,hosts must know a shared initial key.
A) 802.1X initial authentication mode
B) PSK initial authentication mode
C) both A and B
D) neither A nor B

Accepted Answer

In 802.11i, the initial authentication mode can be either 802.1X or PSK. However, the question specifically mentions that hosts must know a shared initial key, which is only possible with the PSK initial authentication mode. Therefore, the best choice is B.

Question 2

If a drive-by hacker succeeds in connecting to an internal access point,the network traffic is ________.
A) still protected by a firewall
B) still protected by encryption
C) both A and B
D) neither A nor B

Accepted Answer

If a hacker succeeds in connecting to an internal access point, the network traffic is no longer protected by the firewall or encryption because the hacker is already inside the network. The firewall and encryption protect against outside threats, but once a hacker is in, they can potentially access all traffic within the network.

Question 3

802.11i PSK initial authentication mode was created for ________.
A) corporations with multiple access points
B) residences with a single access point
C) residences with less than eight access points
D) corporations with less than eight access points

Accepted Answer

802.11i PSK (Pre-Shared Key) initial authentication mode, also known as WPA-PSK (Wi-Fi Protected Access Pre-Shared Key) or WPA2-PSK, was primarily created for simpler networks typically found in residences with a single access point, where implementing a more complex authentication system like 802.1X would be unnecessary and overly complicated.

Question 4

802.11i 802.1X initial authentication mode was created for ________.
A) corporations with multiple access points
B) residences with a single access point
C) residences with less than eight access points
D) corporations with less than eight access points

Accepted Answer

802.11i 802.1X initial authentication mode was created specifically for corporations with multiple access points, to provide secure access control and prevent unauthorized access to the network. It is not intended for use in residences or small businesses with a single access point or a small number of access points.

Question 5

In 802.11i,protection is provided between the client and the ________.
A) access point
B) switch
C) router
D) server

Accepted Answer

In 802.11i, protection is provided between the client and the access point through encryption and authentication mechanisms. It is not provided between the client and the switch, router, or server.

Question 6

Which of the following is a risk in 802.11i PSK mode?
A) Unauthorized sharing of the pre-shared key.
B) A weak passphrase may be selected.
C) both A and B
D) neither A nor B

Accepted Answer

In 802.11i PSK mode, there is a risk of both unauthorized sharing of the pre-shared key and the selection of a weak passphrase. Anyone who gains access to the key can access the network without authorization. On the other hand, a weak passphrase can be easily guessed or cracked, providing unauthorized access to the network. Therefore, the correct answer is C - both A and B.

Question 7

After authentication in 80.11i PSK mode,a wireless client communicates with the access point via a(n)________ key.
A) VPN
B) pairwise session
C) 802.1X
D) preshared

Accepted Answer

In 802.11i PSK mode, after authentication, a wireless client communicates with the access point using a Pairwise Session Key (PSK) for encrypted communication.

Question 8

The protection of communication between a wireless client and the access point is ________.
A) link security
B) end-to-end security
C) both A and B
D) neither A nor B

Accepted Answer

The protection of communication between a wireless client and the access point is known as link security. End-to-end security refers to the protection of communication between two endpoints, such as two clients communicating with each other over a network. Therefore, the correct choice is A.

Question 9

After two wireless clients authenticate themselves via PSK to an access point,they will use ________ to communicate with the access point.
A) the preshared key
B) an 802.1X key
C) WPA keys
D) different pairwise session keys

Accepted Answer

After the initial PSK authentication, each wireless client and the access point will use different pairwise session keys for encryption and communication. This provides a higher level of security compared to using a single preshared key for all communication. Therefore, option D is the correct choice. Options A, B, and C are incorrect as they do not accurately describe the mechanism used for communication after PSK authentication.

Question 10

802.11i provides ________.
A) confidentiality
B) message integrity
C) both A and B
D) neither A nor B

Accepted Answer

802.11i provides both confidentiality and message integrity through the use of Advanced Encryption Standard (AES) encryption and the Counter with CBC-MAC Protocol (CCMP).

Question 11

What is the strongest security protocol for 802.11 today?
A) 802.11s
B) 802.11X
C) WPA
D) 802.11i

Accepted Answer

802.11i, also known as WPA2 (Wi-Fi Protected Access 2), is currently the strongest security protocol for 802.11 networks. It uses advanced encryption, such as AES (Advanced Encryption Standard), to secure wireless communications and prevent unauthorized access.

Question 12

In what initial authentication mode of 802.11i is a central authentication server used?
A) 802.1X
B) PSK
C) both A and B
D) neither A nor B

Accepted Answer

In the initial authentication mode of 802.11i, a central authentication server is used through the 802.1X authentication protocol. PSK (pre-shared key) authentication does not involve a central authentication server. Therefore, the correct answer is A.

Question 13

Communication after authentication is protected most strongly if the ________ initial authentication is used.
A) PSK
B) 802.1X
C) WPA
D) It does not matter which initial authentication mode is used.

Accepted Answer

The answer of Communication after authentication is protected most strongly...

Question 14

The Wi-Fi Alliance calls 802.11i ________.
A) WEP
B) WPA
C) WPA2
D) none of the above

Accepted Answer

The Wi-Fi Alliance introduced WPA (Wi-Fi Protected Access) in 2003 as a replacement for the insecure Wired Equivalent Privacy (WEP). In 2004, the IEEE introduced 802.11i, which included WPA2 as its security protocol. Therefore, 802.11i is equivalent to WPA2, making choice C the correct answer. Choices A and B are not correct as they refer to previous security protocols.

Question 15

In 802.1x initial authentication mode,the VERIFIER is the ________.
A) wireless client
B) wireless access point
C) authentication server
D) none of the above

Accepted Answer

The answer of In 802.1x initial authentication mode,the VERIFIER is...

Question 16

In 802.1x initial authentication mode,the authenticator is the ________.
A) wireless client
B) wireless access point
C) authentication server
D) none of the above

Accepted Answer

In 802.1x initial authentication mode, the authenticator is the wireless access point. This means that the wireless client will need to authenticate itself before it is granted access to the network, with the authentication server being responsible for verifying the credentials of the client. The authenticator acts as the intermediary between the client and the server, ensuring that the authentication process is carried out securely and successfully.

Question 17

Nearly all public Wi-Fi hotspots encrypt your transmissions.

Accepted Answer

While some public Wi-Fi hotspots may use encryption to protect your transmissions, not all of them do. It is important to take precautions such as using a virtual private network (VPN) or avoiding sensitive activities (e.g. online banking) on public Wi-Fi networks.

Question 18

If a firm has many access points,it should use ________ initial authentication mode in 802.11i.
A) PSK
B) 802.1X
C) IPsec
D) WPA

Accepted Answer

When a firm has many access points, it is recommended to use 802.1X initial authentication mode in 802.11i. This will ensure secure authentication of the user and device before accessing the network. 802.1X is an IEEE standard for port-based network access control that provides strong authentication for devices and users on a network, preventing unauthorized access. It is more secure than the pre-shared key (PSK) mode, which requires the same passphrase to be shared among all devices, making it vulnerable to attacks. IPsec and WPA are encryption protocols, not authentication modes.

Question 19

In 802.11i PSK mode,the pass phrase should be at least ________ characters long.
A) 8
B) 12
C) 20
D) 128

Accepted Answer

In 802.11i PSK mode, the pass phrase should be at least 20 characters long. This is because longer passphrases provide stronger security and are more resistant to brute-force attacks, reducing the likelihood of someone guessing the passphrase. While shorter passphrases (such as 8 or 12 characters) can still be used, they may be less secure and more easily guessed. A passphrase of 128 characters is not practical for most users as it is too long and difficult to remember.

Question 20

Which offers stronger security?
A) WPA
B) 802.11i
C) both A and B offer equally strong security.

Accepted Answer

802.11i, also known as WPA2 or Wi-Fi Protected Access II, offers stronger security than WPA. It uses stronger encryption algorithms and provides better protection against hacking and eavesdropping. Therefore, it is recommended to use 802.11i over WPA.

Quiz 7: Wireless Lans II

In 802.11i ________,hosts must know a shared initial key.

If a drive-by hacker succeeds in connecting to an internal access point,the network traffic is ________.

802.11i PSK initial authentication mode was created for ________.

802.11i 802.1X initial authentication mode was created for ________.

In 802.11i,protection is provided between the client and the ________.

Which of the following is a risk in 802.11i PSK mode?

After authentication in 80.11i PSK mode,a wireless client communicates with the access point via a(n) ________ key.

The protection of communication between a wireless client and the access point is ________.

After two wireless clients authenticate themselves via PSK to an access point,they will use ________ to communicate with the access point.

802.11i provides ________.

What is the strongest security protocol for 802.11 today?

In what initial authentication mode of 802.11i is a central authentication server used?

Communication after authentication is protected most strongly if the ________ initial authentication is used.

The Wi-Fi Alliance calls 802.11i ________.

In 802.1x initial authentication mode,the VERIFIER is the ________.

In 802.1x initial authentication mode,the authenticator is the ________.

Nearly all public Wi-Fi hotspots encrypt your transmissions.

If a firm has many access points,it should use ________ initial authentication mode in 802.11i.

In 802.11i PSK mode,the pass phrase should be at least ________ characters long.

Which offers stronger security?