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NEW QUESTION: 1
You administer an Active Directory domain that includes portable computers that have Windows 7 SP1 installed. You tog on to one of the portable computers by using a domain user account and install a new device driver for a bar-code scanner.
You restart the portable computer after installing the new device driver. You successfully log on to the computer by using a domain user account. .
After logging on, you discover that the bar-code scanner is not working due to a driver error. You try to remove the installed driver, but the Roll Back Driver option is unavailable.
You need to be able to roll back the driver to its previous version.
What should you do?
A. Start the computer and select Last Known Good Configuration from the advanced startup options.
B. Run the Device Manager by using elevated permissions.
C. From the Local Group Policy, modify Device Installation Restrictions.
D. Start the portable computer from the Windows 7 installation media and select Startup Repair.
Answer: B

NEW QUESTION: 2
A security administrator examines a network session to a compromised database server with a packet analyzer.
Within the session there is a repeated series of the hex character 90 (x90).
Which of the following attack types has occurred?
A. XML injection
B. SQL injection
C. Cross-site scripting
D. Buffer overflow
Answer: D
Explanation:
Explanation
The hex character 90 (x90) means NOP or No Op or No Operation. In a buffer overflow attack, the buffer can be filled and overflowed with No Op commands.
A buffer overflow occurs when a program or process tries to store more data in a buffer (temporary data storage area) than it was intended to hold. Since buffers are created to contain a finite amount of data, the extra information - w hich has to go somewhere - can overflow into adjacent buffers, corrupting or overwriting the valid data held in them. Although it may occur accidentally through programming error, buffer overflow is an increasingly common type of security attack on data integrity. In buffer overflow attacks, the extra data may contain codes designed to trigger specific actions, in effect sending new instructions to the attacked computer that could, for example, damage the user's files, change data, or disclose confidential information. Buffer overflow attacks are said to have arisen because the C programming language supplied the framework, and poor programming practices supplied the vulnerability.
Incorrect Answers:
B. Cross-site scripting (XSS) is a type of computer security vulnerability typically found in Web applications. XSS enables attackers to inject client-side script into Web pages viewed by other users.
Cross-site scripting uses known vulnerabilities in web-based applications, their servers, or plug-in systems on which they rely. Exploiting one of these, attackers fold malicious content into the content being delivered from the compromised site. When the resulting combined content arrives at the client-side web browser, it has all been delivered from the trusted source, and thus operates under the permissions granted to that system. By finding ways of injecting malicious scripts into web pages, an attacker can gain elevated access-privileges to sensitive page content, session cookies, and a variety of other information maintained by the browser on behalf of the user. A repeated series of the hex character 90 is not an example of an XSS attack.
C. When a web user takes advantage of a weakness with SQL by entering values that they should not, it is known as a
SQL injection attack. Similarly, when the user enters values that query XML (known as XPath) with values that take advantage of exploits, it is known as an XML injection attack. XPath works in a similar manner to SQL, except that it does not have the same levels of access control, and taking advantage of weaknesses within can return entire documents. The best way to prevent XML injection attacks is to filter the user's input and sanitize it to make certain that it does not cause XPath to return more data than it should. A repeated series of the hex character 90 is not an example of XML injection.
D. SQL injection is a code injection technique, used to attack data-driven applications, in which malicious SQL statements are inserted into an entry field for execution (e.g. to dump the database contents to the attacker). SQL injection must exploit a security vulnerability in an application's software, for example, when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is not strongly typed and unexpectedly executed. SQL injection is mostly known as an attack vector for websites but can be used to attack any type of SQL database. A repeated series of the hex character 90 is not an example of SQL injection.
References:
http://searchsecurity.techtarget.com/definition/buffer-overflow
http://en.wikipedia.org/wiki/Cross-site_scripting
http://en.wikipedia.org/wiki/SQL_injection
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 337

NEW QUESTION: 3
2つの顧客マスターデータテーブルを、計算ビューのユニオンノードと組み合わせます。両方のマスターデータテーブルに同じ顧客名が含まれています。同じ顧客が両方のテーブルに存在できます。各顧客が結果に一度だけ表示されることをどのように保証しますか？
A. ユニオンノードの上に集約ノードを含めます。
B. ユニオンノードの上にマイナスノードを追加します。
C. ユニオンノードで、両方のソース顧客名列を1つのターゲット列にマップします。
D. ユニオンノードの上に交差ノードを追加します。
Answer: A