Notes, summaries, assignments, exams, and problems for Technology

Windows Server 2008 Backup Methods

Windows 2008 allows five types of backups:

• Normal Backup: A normal backup is a full backup of all selected files and directories. This process deletes the modified bit (archive bit) of each file copied.
• Incremental Backup: During an incremental backup, the program examines the modified bit and performs a backup only of files that have changed since the last incremental or normal backup. As with the normal backup, this task clears the bits of each modified file that was copied. This type of backup minimizes the time and space needed to save data by storing only changed files. However, if you need to restore files after a disaster, you must have all previous tapes available up to the first normal copy.
• Differential

Fundamental Electrical Signal Parameters

• Cycle: A part of the signal that is repeated.
• Period (T): The time, measured in seconds, that one cycle lasts.
• Frequency (f): The number of cycles repeated per second (Hertz).
• Instantaneous Value: The value of the signal at any given moment.
• Maximum Value (V_max): The greatest signal value within a period (Peak Value).
• Minimum Value (V_min): The smallest signal value within a period (Trough Value).
• Effective Value (V_eff or RMS): The value of an equivalent continuous current that produces the same electrical work. V_eff = V_max / √2

Active and Passive Electronic Components

Active Components

These components are able to generate, modify, or amplify an electrical signal.

Passive Components

Acting as loads, these components... Continue reading "AC Signal Parameters and Core Electronic Components" »