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CWNP CWSP-207 - Questions & Answers

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Question 1
Single choice

Given: You are using a Wireless Aggregator utility to combine multiple packet captures. One capture exists for each of channels 1, 6 and 11.

What kind of troubleshooting are you likely performing with such a tool?

A.

Wireless adapter failure analysis.

B.

Interference source location.

C.

Fast secure roaming problems.

D.

Narrowband DoS attack detection.

Question 2
Single choice

What WLAN client device behavior is exploited by an attacker during a hijacking attack?

A.

When the RF signal between a client and an access point is disrupted for more than a few seconds, the client device will attempt to associate to an access point with better signal quality.

B.

When the RF signal between a client and an access point is lost, the client will not seek to reassociate with another access point until the 120 second hold down timer has expired.

C.

After the initial association and 4-way handshake, client stations and access points do not need to perform another 4-way handshake, even if connectivity is lost.

D.

As specified by the Wi-Fi Alliance, clients using Open System authentication must allow direct client-to-client connections, even in an infrastructure BSS.

E.

Client drivers scan for and connect to access points in the 2.4 GHz band before scanning the 5 GHz band.

Question 3
Single choice

Given: In a security penetration exercise, a WLAN consultant obtains the WEP key of XYZ Corporation's wireless network. Demonstrating the vulnerabilities of using WEP, the consultant uses a laptop running a software AP in an attempt to hijack the authorized user's connections. XYZ's legacy network is using 802.11n APs with 802.11b, 11g, and 11n client devices.
With this setup, how can the consultant cause all of the authorized clients to establish Layer 2 connectivity with the software access point?

A.

All WLAN clients will reassociate to the consultant's software AP if the consultant's software AP provides the same SSID on any channel with a 10 dB SNR improvement over the authorized AP.

B.

A higher SSID priority value configured in the Beacon frames of the consultant's software AP will take priority over the SSID in the authorized AP, causing the clients to reassociate.

C.

When the RF signal between the clients and the authorized AP is temporarily disrupted and the consultant's software AP is using the same SSID on a different channel than the authorized AP, the clients will reassociate to the software AP.

D.

If the consultant's software AP broadcasts Beacon frames that advertise 802.11g data rates that are faster rates than XYZ's current 802.11b data rates, all WLAN clients will reassociate to the faster AP.

Question 4
Single choice

You perform a protocol capture using Wireshark and a compatible 802.11 adapter in Linux. When viewing the capture, you see an auth req frame and an auth rsp frame. Then you see an assoc req frame and an assoc rsp frame. Shortly after, you see DHCP communications and then ISAKMP protocol packets.

What security solution is represented?

A.

802.1X/EAP-TTLS

B.

Open 802.11 authentication with IPSec

C.

802.1X/PEAPv0/MS-CHAPv2

D.

WPA2-Personal with AES-CCMP

E.

EAP-MD5

Question 5
Multiple choice

Given: ABC Corporation is evaluating the security solution for their existing WLAN. Two of their supported solutions include a PPTP VPN and 802.1X/LEAP. They have used PPTP VPNs because of their wide support in server and desktop operating systems. While both PPTP and LEAP adhere to the minimum requirements of the corporate security policy, some individualshave raised concerns about MS-CHAPv2 (and similar) authentication and the known fact that MS-CHAPv2 has proven vulnerable in improper implementations.
As a consultant, what do you tell ABC Corporation about implementing MS-CHAPv2 authentication? (Choose 2)

A.

MS-CHAPv2 is compliant with WPA-Personal, but not WPA2-Enterprise.

B.

MS-CHAPv2 is subject to offline dictionary attacks.

C.

LEAP's use of MS-CHAPv2 is only secure when combined with WEP.

D.

MS-CHAPv2 is only appropriate for WLAN security when used inside a TLS-encrypted tunnel.

E.

MS-CHAPv2 uses AES authentication, and is therefore secure.

F.

When implemented with AES-CCMP encryption, MS-CHAPv2 is very secure.

Question 6
Single choice

Given: John Smith uses a coffee shop's Internet hot-spot (no authentication or encryption) to transfer funds between his checking and savings accounts at his bank's website. The bank's website uses the HTTPS protocol to protect sensitive account information. While John was using the hot-spot, a hacker was able to obtain John's bank account user ID and password and exploit this information.

What likely scenario could have allowed the hacker to obtain John's bank account user ID and password?

A.

John's bank is using an expired X.509 certificate on their web server. The certificate is on John's
Certificate Revocation List (CRL), causing the user ID and password to be sent unencrypted.

B.

John uses the same username and password for banking that he does for email. John used a POP3 email client at the wireless hot-spot to check his email, and the user ID and password were not encrypted.

C.

John accessed his corporate network with his IPSec VPN software at the wireless hot-spot. An IPSec VPN only encrypts data, so the user ID and password were sent in clear text. John uses the same username and password for banking that he does for his IPSec VPN software.

D.

The bank's web server is using an X.509 certificate that is not signed by a root CA, causing the user ID and password to be sent unencrypted.

E.

Before connecting to the bank's website, John's association to the AP was hijacked. The attacker intercepted the HTTPS public encryption key from the bank's web server and has decrypted John's login credentials in near real-time.

Question 7
Multiple choice

Given: You manage a wireless network that services 200 wireless users. Your facility requires 20 access points, and you have installed an IEEE 802.11-compliant implementation of 802.1X/LEAP with AES-CCMP as an authentication and encryption solution.
In this configuration, the wireless network is initially susceptible to what type of attacks? (Choose 2)

A.

Encryption cracking

B.

Offline dictionary attacks

C.

Layer 3 peer-to-peer

D.

Application eavesdropping

E.

Session hijacking

F.

Layer 1 DoS

Question 8
Single choice

What 802.11 WLAN security problem is directly addressed by mutual authentication?

A.

Wireless hijacking attacks

B.

Weak password policies

C.

MAC spoofing

D.

Disassociation attacks

E.

Offline dictionary attacks

F.

Weak Initialization Vectors

Question 9
Single choice

Given: You have a Windows laptop computer with an integrated, dual-band, Wi-Fi compliant adapter. Your laptop computer has protocol analyzer software installed that is capable of capturing and decoding
802.11ac data.

What statement best describes the likely ability to capture 802.11ac frames for security testing purposes?

A.

All integrated 802.11ac adapters will work with most protocol analyzers for frame capture, including the Radio Tap Header.

B.

Integrated 802.11ac adapters are not typically compatible with protocol analyzers in Windows laptops.
It is often best to use a USB adapter or carefully select a laptop with an integrated adapter that will work.

C.

Laptops cannot be used to capture 802.11ac frames because they do not support MU-MIMO.

D.

Only Wireshark can be used to capture 802.11ac frames as no other protocol analyzer has implemented the proper frame decodes.

E.

The only method available to capture 802.11ac frames is to perform a remote capture with a compatible access point.

Question 10
Multiple choice

ABC Company uses the wireless network for highly sensitive network traffic. For that reason, they intend to protect their network in all possible ways. They are continually researching new network threats and new preventative measures. They are interested in the security benefits of 802.11w, but would like to know its limitations.

What types of wireless attacks are protected by 802.11w? (Choose 2)

A.

RF DoS attacks

B.

Layer 2 Disassociation attacks

C.

Robust management frame replay attacks

D.

Social engineering attacks

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