Summary

20 network printernetwork printer A printer connected to the computernetwork that is set up to be shared by multipleusers.network server A computer that provides somenetwork services, such as file sharing, and that canhandle multiple users and multiple jobs.network topology The way in which computers,printers, and other devices are connected.New Technology File System (NTFS) A type offile system that provides improved fault toleranceover traditional file systems, and also provides filelevelsecurity.nibbleHalf a byte, or 4 bits.node 1) The endpoint of a network connection or ajunction common to two or more lines in a network.Nodes can be processors, controllers, or workstations.Nodes, which vary in routing and other functionalcapabilities, can be interconnected by links, and theyserve as control points in the network. The term nodeis sometimes used generically to refer to any entitythat can access a network, and it is frequently usedinterchangeably with device. 2) In Systems NetworkArchitecture (SNA), the basic component of a network,and the point at which one or more functionalunits connect channels or data circuits.noise Interference, such as EMI or RFI, that causesunclean power and may cause errors in a computersystem.nonbootable disk A damaged or missing disk, or adisk that does not contain one or more system bootfiles.northbridge One of the two chips in the core logicchipset of a PC motherboard. It typically handlescommunications between the CPU, RAM, AGP,PCIe, and the southbridge core chip. Also called aMemory Controller Hub (MCH).NSLOOKUP A command that returns the IPaddress of a given hostname. This command can alsodo the reverse and find the hostname for a specifiedIP address.NTDETECT A program used by Intel-based systemsto detect installed hardware.Num Lock indicator LED A light that shows theon/off status of the ten-key number pad.OOhm’s Law The mathematical relationshipbetween current, resistance, and voltage, in whichvoltage is equal to the current multiplied by theresistance.operating system A software program that performsgeneral system tasks, such as controllingRAM, prioritizing the processing, controlling inputand output devices, and managing files.optical drive A disk drive that uses a laser to readand/or write CDs and DVDs.optical drive activity indicator LEDshows drive activity.PA light thatpacket A logical grouping of information thatincludes a header that contains control informationand usually user data. The term packet is most oftenused to refer to network layer units of data. Theterms datagram, frame, message, and segment arealso used to describe logical information groupingsat various layers of the OSI reference model and invarious technology circles.