Summary

ping 21Page Description Language (PDL) Code thatdescribes the contents of a document in a languagethat the printer can understand.personal digital assistant (PDA) A standalone,handheld device with computing and communicatingabilities.The measure of a print-pages per minute (ppm)er’s speed.Phillips-head screwdriveror loosen crosshead screws.A tool used to tightenParallel Advanced Technology Attachment (PATA)The standard for connecting hard drives and opticaldrives into computer systems. Uses a parallel signalingtechnology.parallel ATA (PATA) data cable An internal cablethat transfers data between the motherboard and anATA drive.parallel cable An external cable that connects thecomputer’s parallel port to a printer or another parallelcommunications device. Also called a printercable.parallel port A socket used to connect a devicesuch as a printer or scanner.partition To divide memory or mass storage intoisolated or logical sections. After a disk is partitioned,each partition behaves like a separate diskdrive.PC Card An expansion card used in laptops toconform to PCMCIA standards.peer-to-peer computing Each network device runsboth client and server portions of an application.Also describes communication between implementationsof the same OSI reference model layer in twodifferent network devices.Personal Computer Memory Card InternationalAssociation (PCMCIA) An industry trade associationthat defines laptop expansion card standards.phishing A type of spam intended to persuade therecipient to provide the sender with information thatwill enable the sender to access the recipient’s personalinformation.physical layer Layer 1 of the Open SystemsInterconnection (OSI) reference model. The physicallayer defines the electrical, mechanical, procedural,and functional specifications to activate, maintain,and deactivate the physical link between end systems.Corresponds with the physical control layer inthe Systems Network Architecture (SNA) model. TheOSI reference model includes the application layer,presentation layer, session layer, transport layer, networklayer, data link layer, and physical layer.physical topology The physical layout of the componentson the network.piezoelectric For printers, an electrically chargedplate changes the nozzle’s size and shape. Thischange in size causes the nozzle to act like a pump.The pumping action forces ink out through the nozzleand onto the paper.ping A simple but highly useful command-lineutility that is included in most implementations ofTCP/IP. Ping can be used with either the hostname orthe IP address to test IP connectivity. Determineswhether a specific IP address is accessible by sendingan ICMP echo request to a destination computeror other network device. The receiving device thensends back an ICMP echo reply message.