Summary

Regedit 23Printer Control Language (PCL) Developed byHewlett-Packard to allow software applications tocommunicate with HP and HP-compatible laserprinters. PCL is now an industry standard for mostprinter types.printer driver Software that must be installed on aPC so that the printer can communicate and coordinatethe printing process.printer network interface card (NIC) An adapterthat the printer uses to access the network media.printer-output option Determines how the ink ortoner is transferred to the paper. Includes color management,print quality, and speed.printer queue A temporary holding area for printjobs. The jobs in the queue are fed to the printerwhen it is ready for the next job.print resolution The number of tiny dots that theprint head places per inch on the paper when formingan image.protected mode Allows programs to access morethan 1 MB of physical memory. Also protects againstmisuse of memory, such as programs that cannotexecute a data segment or write into a code segment.protocol 1) A formal description of a set of rulesand conventions that govern how devices on a networkexchange information. 2) A field within an IPdatagram that indicates the upper-layer (Layer 4)protocol that sent the datagram.protocol data unit (PDU) A unit of data that isspecified in a protocol of a layer of the OSI referencemodel. For example, the PDU for Layer 1 is bits orthe data stream, Layer 2 is framing, Layer 3 is thepacket, and Layer 4 is the segment.proxy An entity that, in the interest of efficiency,acts on behalf of another entity.Public Switched Telephone Network (PSTN) Ageneral term that refers to the variety of telephonenetworks and services in place worldwide.Sometimes called plain old telephone service(POTS).Rradio frequency (RF) A generic term that refers tofrequencies that correspond to radio transmissions.Cable TV and broadband networks use RF technology.radio frequency interference (RFI) Radio frequenciesthat create noise that interferes with informationbeing transmitted across unshielded coppercabling.random-access memory (RAM) Memory thattemporarily stores data for processing by the CPU.Also called physical memory.read-only memory (ROM) Memory that permanentlystores prerecorded configuration settings anddata on a chip that can only be read. This type ofmemory retains its contents when power is not beingsupplied to the chip.Reduced Instruction Set Computer (RISC) Anarchitecture that uses a relatively small set of instructions.RISC chips are designed to execute theseinstructions very rapidly.Redundant Array of Independent Disks (RAID)Provides fault tolerance to prevent loss of data in theevent of disk drive failure on a network server. Alsoknown as Redundant Array of Inexpensive Disks.Regedit A Windows application that allows usersto edit the registry.