Download Computer technology encyclopedia: quick reference for by Michael Graves PDF

By Michael Graves

The pc expertise Encyclopedia is a convenient reference for college kids and pros. Going past simple definitions, this entire reference presents descriptions of machine expertise phrases, in addition to together with a variety of tables, pictures and illustrations.

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Alarms can be used by server applications to notify the administrator of an anomaly, or a scheduling program can use it to let a user know an appointment time is nearing. alarm filtering A process by which multiple alarms on a system that may have been precipitated by a single event can be sorted out, narrowing all the information down until the cause of the alarm is isolated. A single failure of a device or application can create a cascade effect, causing numerous other devices or applications to fail.

Conventional DSL, sometimes known as asymmetric DSL, is another anisotropic communications link. The opposite of anisotropic is isotropic. anomaly Any unexplained event or output. A software conflict between two similar applications might be considered an anomaly. A hardware device that works on one system, but not on another identically configured system, is another example. A classic example of an anomaly is an operating system that continuously crashes, has more holes in its security than a mohair sweater under attack by a litter of kittens, but for some reason is the best-selling product in the entire industry.

Memory access time is measured as a function of how long it takes for the row access strobe to locate the correct row of memory cells and for the column access strobe to lock onto the column. Disk drives are not so scientific in their approach. Average access time for a disk drive is the amount of time it takes for the actuator arm to travel one third of the distance across the platter. access validation The process of access validation is what makes Windows security work the way that it does. When the user attempts to access an object for the first time, an NT function called the Security Reference Monitor (SRM) examines the user’s access token and compares it to the object’s ACL.

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