A form of signal modulation in which the data is encoded in the amplitude of a series, or train, of regularly recurrent signal pulses. PAM is used less frequently than PCM.
- pulse code modulation
Short for pulse code modulation, a sampling technique for digitizing analog signals, especially audio signals. PCM samples the signal 8000 times a second; each sample is represented by 8 bits for a total of 64 Kbps. There are two standards for coding the sample level. The Mu-Law standard is used in North America and Japan […]
- Pulsing Zombie
A form of DoS attack known as a degradation-of-service attack, as opposed to a denial-of-service attack. Unlike a regular zombie that paralyzes a system by inundating it with a steady stream of attack traffic, the pulsing zombie attacks with irregular small bursts of attack traffic from multiple sources on a single target over an extended […]
- punchdown block
(n.) A device that connects one group of wires to another group of wires through a system of metal pegs that the wires are attached to, often used in telecommunications closets that support local-area networks. Punchdown blocks are the predecessors to patch panels and were commonly used to support low-bandwidth Ethernet and token-ring networks. Punchdown […]
Like punctuation in human languages, punctuation in programming languages serves to separate words and phrases. But unlike human punctuation, which is often optional, computer punctuation is strictly required.
To systematically and permanently remove old and unneeded data. The term purge is stronger than delete. It is often possible to regain deleted objects by undeleting them, but purged objects are gone forever.