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D is correct NetStumbler may be categorized as an eavesdropping tool A, B, and C are incorrect NetStumbler cannot perform encryption cracking, DoS attacks, or hijacking
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8 When an attacker gains control over dozens of nodes and uses them to attack a target, what kind of DoS attack is employed A Distributed B Large C Small D Deployed
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A is correct This description is that of a distributed DoS (DDoS) attack B, C, and D are incorrect These answers are simply incorrect
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9 What management interface may be exploited across wireless connections if not secured properly A Console B Web-based C Serial D Manual switches
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B is correct Web-based management interfaces may be exploited across the wired or wireless LAN if not secured A, C, and D are incorrect Console and serial access is available only at the physical location of the device Manual switches would require physical access in order to manipulate them
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10 Which one of the following protocols is insecure regardless of the implementation method A WPA B WPA2 C WEP D 80211i
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C is correct WEP is considered insecure in any implementation today A, B, and D are incorrect WPA and WPA2 can be implemented in a secure manner 80211i defines a very secure WLAN
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11 What two methods can be used to crack WPA when PSK is used A Handshake capturing B Brute force C Weak IV detection D Protocol remapping
A and B are correct The four-way handshake may be captured and used to crack the WPA passphrase Brute-force attempts may also be used C and D are incorrect Weak IV attacks only work against WEP, and there is no such thing as protocol remapping in relation to WLAN security
12 Which security technique is not effective due to simple hacks A MAC filtering B WPA-Enterprise C WPA2-Enterprise D 80211i
A is correct MAC filtering can be easily circumvented through MAC spoofing efforts B, C, and D are incorrect WPA and WPA2 enterprise implementations are very strong 80211i defines stronger security solutions that may replace WEP
13 Peer-to-peer attacks are often launched using what kind of WLAN (Choose the best single answer) A Infrastructure B ESS C Cisco D Ad hoc
D is correct Ad hoc WLANs are usually used to perform peer-to-peer attacks A, B, and C are incorrect Infrastructure and ESS WLANs are very difficult to use for peer-to-peer attacks because the communications must pass through the AP Cisco is a hardware vendor, and attacks may be launched against their devices when improperly configured; however, Cisco s hardware is not more prone to such attacks than any other vendor s
14 What attack method exploits the human element and does not rely on technical ability A WEP cracking B WPA cracking C Social engineering D Brute-force attacks
Self Test Answers
C is correct Social engineering employs manipulation tactics in order to gain information for access to wireless and wired networks A, B, and D are incorrect WEP and WPA cracking, as well as brute-force attacks, use technical tools for the attacks
15 At what OSI model layers does hijacking usually occur (Choose two) A Layer 1 B Layer 2 C Layer 3 D Layer 4
B and C are correct Layer 2 and layer 3, the Data Link and Network layers, are the common layers hijacked A and D are incorrect Layer 1, the Physical layer, cannot really be hijacked Layer 4, the Transport layer, is hijacked only through layer 3 and is not considered the layer at which hijacking occurs
LAB ANSWER
A client has requested that you analyze the current security used on the organization s WLAN Twelve APs are installed, and three more will be added in the next twelve months The current network uses WPA-PSK, and the key is the same as it was when first installed The current key is: 67yHju What would you recommend to this client and why The following represents one possible solution to the labYour answer may vary You may recommend that the client implement WPA2-Enterprise as the new APs are installed First, the current key is too weak to resist cracking attempts It should be much longer Second, the organization is not rotating WPA keys, and this is a serious security concern By implementing 80211i robust security networks, the organization can take advantage of centralized security with automatic key changes This configuration will result in greater security and easier long-term maintenance
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