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Virtual machine usage for testing is rapidly being adopted One of the main benefits for the individual tester is convenience maintenance of one physical computer and a library of virtual machines is much simpler than maintaining several physical computers Another big benefit is that a whole set of virtual machines can be easily run by one tester on a single computer, whereas traditionally, testers might need several computers in their office or access to a large lab Cost savings is another benefit that virtual machines provide Costs are reduced by using fewer computers and by getting better usage out of the existing hardware as a result of the parallelization benefits of VMs These savings are beneficial in a tester's or developer's individual office as well as in a test lab In the Office Testers and developers often need multiple computers in their office.

When others make changes to the notebook, Office OneNote 2007 automatically synchronizes the changes so that the most recent changes are reflected in all versions of the file. Tip All programs in the 2007 Microsoft Office System include the capability of saving files in PDF or XPS format, and Office OneNote 2007 is no exception. When you save your notebook in Portable Document Format (PDF) or XML Paper Specification (XPS) format, you save a final formatted version of the file that others can view (but not modify) whether they have Office OneNote 2007 or not.

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As covered earlier, almost all services provide an inbound listening channel for remote access. Buffer overflows are caused when a service contains an unchecked input routine that allows more information to be sent than the previously set aside buffer area. Vulnerable services can be exploited, causing service disruption or, in the worst cases, allowing the attacker to gain access to the exploited system in the security context of the service s log-on account. If this account is Local System or an administrator, attackers can then perform any programmatic action they like on the exploit system, including system control, downloading content, installing more malware, and loading remote control shells.

A service with a programming bug can be prevented from performing its normal operations, temporarily or permanently (until the service is restarted or the computer is rebooted). Sometimes it takes a more sophisticated buffer overflow attack and sometimes a single network packet or character. For example, an old version of the Microsoft SQL Server Resolution Service was found to be vulnerable to a single unexpected ASCII character of 0x04 (http://www.iss.net/ security_center/reference/2106151.html). A single malformed network packet was the culprit in the XP SP2 LAND attack (http://seclists.org/bugtraq/2005/Mar/0112.html). Denial of service attacks prevent legitimate servicing and can cause system processing interruptions, uncontrollable resource consumption, and unexpected computer reboots.

For example, they might need to test on different hardware architectures or on multiple computers at once Rather than fill their office with computers (in my career as a tester, I have had as many as 10 physical test computers in my office), each office can have one Hyper-V server with several different VMs running on it By using virtualization, testers and developers can create VMs with various specifications at the same time, and configuration is relatively fast and simple This flexibility allows testers and developers to get much greater test coverage without adding additional hardware to their offices Test Lab Savings Test lab managers can use the server consolidation application of Hyper-V to make their existing hardware more efficient and get the most out of new investments.

Many services (FTP, IIS, Remote Desktop, Terminal Services, and so on) provide additional log-on points where an intruder can attempt to guess at log-on names and passwords to gain unauthorized access. By default the Administrator account is not locked out using normal Account Lockout settings. Intruders can use an advertised log-on service to attempt to guess the Administrator password over and over, either manually or using automated password-guessing tools. Unless the Security log is being monitored for bad log-ons, password guessing using the Administrator account could go on for quite awhile without being noticed.

Another way you can share notebooks with others and review items together online is by inviting others to join a live note-taking session. When you choose Live Sharing Session and then Start Sharing Current Section from the Share menu, the Start Live Session Task Pane opens (see Figure 8-14). You can enter the necessary information, choose the pages you want to share, and start the session. When you include Invite Participates on the second page of the Start Live Session Task Pane, an e-mail message is displayed with an invitation to the sharing session. You simply add your team members to the To line and send the message. Others can then join the session simply by opening the attachment, and you can review the notes, add text and drawings, and invite feedback during the shared session. When you end the session, the notes are saved on each participant s computer automatically.

Part I:

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