Posts Tagged ‘DoS’

What is a denial of service (DoS) attack?

posted by Tom
Jan 6

A denial of service (DoS) attack is an incident in which a user or organization is deprived of the services of a resource they would normally expect to have. In a distributed denial-of-service, large numbers of compromised systems (sometimes called a botnet) attack a single target.

Although a DoS attack does not usually result in the theft of information or other security loss, it can cost the target person or company a great deal of time and money. Typically, the loss of service is the inability of a particular network service, such as e-mail, to be available or the temporary loss of all network connectivity and services. A denial of service attack can also destroy programming and files in affected computer systems. In some cases, DoS attacks have forced Web sites accessed by millions of people to temporarily cease operation.

Common forms of denial of service attacks are: Read More…

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Command-Line Shortcuts for Beginners

posted by Tom
Jul 22

After careful research done in the Windows XP online community, I’ve decided these command-line shortcuts are best for beginners:

• shutdown for shutting down the system
• convert for converting a FAT file system to NTFS

To get more information about any command, type command name /?. Then press Enter.

Shut Down the System

Although shutting down the computer from the Start menu is faster and easier, the shutdown command can also be issued at a command prompt to shut down the computer. The shutdown command also offers parameters to log off a user, restart the computer, and abort a system shutdown. If you ever have to boot to the command-line to troubleshoot a problem, you’ll want to know how this command works. To shut down the computer and experiment with other options:

1. Close all open programs to avoid loss of data.
2. Open Command Prompt from the shortcut created in the previous section or by clicking Start, pointing to All Programs, pointing to Accessories, and clicking Command Prompt.
3. At the command prompt, type shutdown -s. Press Enter or Return on the keyboard. A shutdown dialog box opens.
4. To abort the shutdown in progress, at the command prompt, type shutdown -a.

Other options include -r to restart the system, -m \\computername to shut down a remote computer, and -l to log off of the computer. To see all the options, type shutdown /? at the command prompt.

Convert a FAT File System to NTFS

If your file system is configured as FAT instead of NTFS, you’re missing out on quite a few extra perks. Using NTFS, you get increased security, file compression, disk quotas, and encryption—features you don’t get with FAT. For the pros and cons of both file systems, read Charlie Russel’s article, NTFS vs. FAT: Which is Right for You? If you do decide to convert, it’s quite simple: Read More…

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