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NEW QUESTION: 1
After a recent breach, the security administrator performs a wireless survey of the corporate network. The security administrator notices a problem with the following output:
MAC SSID ENCRYPTION POWER BEACONS
00:10:A1:36:12:CC MYCORP WPA2 CCMP 60 1202
00:10:A1:49:FC:37 MYCORP WPA2 CCMP 70 9102
FB:90:11:42:FA:99 MYCORP WPA2 CCMP 40 3031
00:10:A1:AA:BB:CC MYCORP WPA2 CCMP 55 2021
00:10:A1:FA:B1:07 MYCORP WPA2 CCMP 30 6044
Given that the corporate wireless network has been standardized, which of the following attacks is underway?
A. Rogue AP
B. DDoS
C. Evil twin
D. IV attack
Answer: C
Explanation:
The question states that the corporate wireless network has been standardized. By 'standardized' it means the w ireless network access points are running on hardware from the same vendor. We can see this from the MAC addresses used. The first half of a MAC address is vendor specific. The second half is network adapter specific. We have four devices with MAC addresses that start with 00:10:A1.
The "odd one out" is the device with a MAC address starting FB:90:11. This device is from a different vendor. The SSID of the wireless network on this access point is the same as the other legitimate access points. Therefore, the access point with a MAC address starting FB:90:11 is impersonating the corporate access points. This is known as an Evil
Twin.
An evil twin, in the context of network security, is a rogue or fake wireless access point (WAP) that appears as a genuine
HOTSPOT offered by a legitimate provider.
In an evil twin attack, an eavesdropper or hacker fraudulently creates this rogue
HOTSPOT to collect the personal data of unsuspecting users. Sensitive data can be stolen by spying on a connection or using a phishing technique.
For example, a hacker using an evil twin exploit may be positioned near an authentic Wi-Fi access point and discover the service set identifier (SSID) and frequency. The hacker may then send a radio signal using the exact same frequency and SSID. To end users, the rogue evil twin appears as their legitimate
HOTSPOT with the same name.
In wireless transmissions, evil twins are not a new phenomenon. Historically, they were known as honeypots or base station clones. With the advancement of wireless technology and the use of wireless devices in public areas, it is very easy for novice users to set up evil twin exploits.
Incorrect Answers:
B. An initialization vector is a random number used in combination with a secret key as a means to encrypt data. This number is sometimes referred to as a nonce, or "number occurring once," as an encryption program uses it only once per session.
An initialization vector is used to avoid repetition during the data encryption process, making it impossible for hackers w ho use dictionary attack to decrypt the exchanged encrypted message by discovering a pattern. This is known as an
IV attack. This is not what is described in this question.
C. A rogue access point is a wireless access point that has either been installed on a secure company network without explicit authorization from a local network administrator, or has been created to allow a hacker to conduct a man-in- the-middle attack. Rogue access points of the first kind can pose a security threat to large organizations with many employees, because anyone with access to the premises can install (maliciously or non-maliciously) an inexpensive w ireless router that can potentially allow access to a secure network to unauthorized parties. Rogue access points of the second kind target networks that do not employ mutual authentication (client-server server-client) and may be used in conjunction with a rogue RADIUS server, depending on security configuration of the target network. The Evil
Twin in this question is a type of rogue access point. However, as the access point is impersonating the corporate network, it is classed as an Evil Twin.
D. A distributed denial-of-service (DDoS) attack occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. Such an attack is often the result of multiple compromised systems
(for example a botnet) flooding the targeted system with traffic. When a server is overloaded with connections, new connections can no longer be accepted. The major advantages to an attacker of using a distributed denial-of-service attack are that multiple machines can generate more attack traffic than one machine, multiple attack machines are harder to turn off than one attack machine, and that the behavior of each attack machine can be stealthier, making it harder to track and shut down. These attacker advantages cause challenges for defense mechanisms. For example, merely purchasing more incoming bandwidth than the current volume of the attack might not help, because the attacker might be able to simply add more attack machines. This after all will end up completely crashing a website for periods of time. This is not what is described in this question.
References:
http://www.techopedia.com/definition/5057/evil-twin
http://www.techopedia.com/definition/26858/initialization-vector
http://en.wikipedia.org/wiki/Denial-of-service_attack
NEW QUESTION: 2
BYODのデュアルSSID設計を実装するときに重要な考慮事項は何ですか？
A. プロビジョニングSSIDを使用した後、クライアントをSSIDに切り替えるために使用されたACLにより、ユーザーはMACフィルタリングによってネットワークを関連付け、トラバースします。
B. 1つのSSIDはプロビジョニング用で、もう1つのSSIDはネットワークへのアクセス用です。プロビジョニング後にクライアントをREAL SSIDに接続させるために、ACLの使用を強制すべきではありません。
C. 複数のWLCが使用されている場合、クライアントがプロビジョニングされ、ネットワークを正しく通過するには、WLAN IDが正確である必要があります。
D. このセットアップのSSIDは、クライアントがCisco ISEで認証するためのNAC State-RADIUS NAC、またはCisco ISEがクライアントを関連付けるためのNAC State-ISE NACで構成する必要があります。
Answer: B
Explanation:
NEW QUESTION: 3
A. Nexus 7010 Switch
B. Identity Services Engine
C. Prime Infrastructure
D. Wireless Access Points
E. Cisco 3945 Router
Answer: B,C
NEW QUESTION: 4
Note: This question is part of a series of questions that use the same scenario. For your convenience, the scenario is repeated in each question. Each question presents a different goal and answer choices, but the text of the scenario is exactly the same in each question in this series.
You maintain a Microsoft SQL Server instance that contains the following databases SalesDb1, SalesDb2, and SalesDb3. Each database has tabled named Products and Sales. The following table shows the configuration of each database.
The backup strategies for each database are described in the following table.
Each full or differential backup operation writes into a new file and uses a different sequence number. You observe the following database corruption issues.
SalesDb3 reports a number of database corruption issues related to error 823 and 824 when reading data pages.
You must display the following information about the corrupted pages:
* database name
* impacted file id
* impacted file physical name
* impacted page id
* event type that identifies the error type
* error count
Users report performance issues when they run queries against SalesDb2. You plan to monitor query statistics and execution plans for SalesDb2 by using Query Store. The monitoring strategy must meet the following requirements:
* Perform automatic data cleanup when query store disk usage reaches 500 megabyte (MB).
* Capture queries based on resource consumption.
* Use a stale query threshold value of 60 days.
The query optimizer generates suboptimal execution plans for a number of queries on the Sales table in SalesDb2. You will create a maintenance plan that updates statistics for the table. The plan should only update statistics that were automatically created and have not been updated for 30 days. The update should be based on all data in the table.
You need to recover SalesDb2 and SalesDb3 while minimizing the data loss.
In the table below, identify the recovery strategy you should use for each database.
NOTE: Make only one selection in each column. Each correct selection is worth one point.
Answer:
Explanation:
Explanation
SalesDB2:
Row data are torn (error 824)
How to Fix Torn Pages
Run DBCC checkdb see for inconsistencies
Check your error logs first and then restore your last backups and transaction logs.
All backups are lost.
SalesDB3:
Checksum issues for data pages.
FEPAIR_REBUILD
Performs repairs that have no possibility of data loss. This can include quick repairs, such as repairing missing rows in non-clustered indexes, and more time-consuming repairs, such as rebuilding an index.
References:
https://docs.microsoft.com/en-us/sql/relational-databases/backup-restore/manage-the-suspect-pages-table-sql-ser