Term
|
Definition
| An Ethernet standard that operates at 100Mbps and uses twisted-pair cabling up to 100 meters (328 feet). Also called Fast Ethernet. Variations of 100BaseT are 100BaseTX and 100BaseFX. |
|
|
Term
|
Definition
| An outdated Ethernet standard that operates at 10 Mbps and uses small coaxial cable up to 500 meters long. Also calledThinNet |
|
|
Term
|
Definition
| An outdated Ethernet standard that operates at 10 Mbps and uses thick coaxial cable up to 500 meters long. Also called ThickNet. |
|
|
Term
|
Definition
A device connected to a LAN
that provides wireless communication so that computers, printers, and other wireless devices can communicate with devices on the LAN. |
|
|
Term
|
Definition
| An IP address in the address range 169.254.x.y, used by a computer when it cannot successfully lease an IP address from a DHCP server. |
|
|
Term
|
Definition
| A connector used with thin coaxial cable. Some BNC connectors are T-shaped and called T-connectors. One end of the T connects to the NIC, and the two other ends can connect to cables or end a bus formation with a terminator |
|
|
Term
|
Definition
| A rating used for UTP cable that is less expensive than the more popular CAT-5 cable. |
|
|
Term
|
Definition
| A rating for UTP cables required for fast ethernet. |
|
|
Term
|
Definition
| A rating for a UTP cable for fast ethernet with less crosstalk. |
|
|
Term
|
Definition
| A rating for a UTP cable for fast ethernet with even less crosstalk. |
|
|
Term
|
Definition
| A cable with a single copper wire down the middle and a braided shield around it |
|
|
Term
|
Definition
| A cable used to connect two PCs into the simplest network possible. Also used to connect two hubs to two switches. |
|
|
Term
|
Definition
| A protocol used by a server to assign dynamic IP addresses to computers on a network when they first access the network |
|
|
Term
|
Definition
| A protocol used by a DNS server to find an IP address for a computer when the fully qualified domain name is known. |
|
|
Term
|
Definition
| is a type of computer printing which uses a print head that runs back and forth, or in an up and down motion, on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like the print mechanism on a typewriter. |
|
|
Term
|
Definition
| a family of computer networking technologies for local area networks (LANs) |
|
|
Term
|
Definition
| Cable that transmits signals as pulses of light over glass or plastic strands inside protected tubing |
|
|
Term
|
Definition
| Communication that happens in two directions at the same time. |
|
|
Term
|
Definition
| a formatted unit of data, control information and user data, carried in/through/between networks. |
|
|
Term
|
Definition
| Communication between two devices whereby transmission takes place in only one direction at a time |
|
|
Term
|
Definition
| A power-saving state that saves all work to the hard drive and powers down the system. |
|
|
Term
|
Definition
| A network device or box that provides a central location to connect cables and distributes incoming data packets to all other devices connected to it. Compare toswitch |
|
|
Term
|
Definition
| A port used for high-speed multimedia devices such as camcorders |
|
|
Term
|
Definition
| IEEE specifications for wireless communication and data synchronization. Also known as Wi-Fi. IEEE b/g/n standards are current, and IEEE 802.11a is outdated. |
|
|
Term
|
Definition
| A type of ink dispersion printer that uses cartridges of ink. The ink is heated to a boiling point and then ejected onto the paper through tiny nozzles. |
|
|
Term
|
Definition
| a global system of interconnected computer standard TCP/IP to serve billions of users worldwide |
|
|
Term
|
Definition
| Any private network that uses the TCP/IP protocols. A large enterprise may support several local networks. |
|
|
Term
|
Definition
| used to find computers on subnets, an intranet, or the internet. |
|
|
Term
|
Definition
| command line tool to check the current network configurations. |
|
|
Term
| JBOD(Just a Bunch of Disks or Joined Body of Disks) |
|
Definition
| when all disks are independently addressed, with no collective properties. |
|
|
Term
|
Definition
| A portable computer that is designed for travel and mobility. Notebooks use the same technology as desktop PCs, with modifications for conserving voltage, taking up less space, and operating while on the move. |
|
|
Term
|
Definition
| assembly where heat of up to 200 °C (392 °F) and pressure bond the plastic powder to the paper |
|
|
Term
| laser printer transfer roller |
|
Definition
| a positively charged roller on the back side of the paper to pull the toner from the photoreceptor to the paper |
|
|
Term
| laser printing process - cleaning |
|
Definition
| A sweeper strip cleans the drum of any leftover toner and the drum charge is then neutralized. |
|
|
Term
| laser printing process - conditioning |
|
Definition
| a roller that charges the surface of the drum uniformly with a -600V charge |
|
|
Term
| laser printing process - developing |
|
Definition
| a cylinder puts toner on the drum. The toner is charged and sticks to the cylinder because of magnets inside the cylinder. A control blade controls the toner so too much is not applied. As cylinder and drum spin, the toner is attracted to the -100V parts if the drum surface and repelled by the -600V part of the drum surface, resulting in the toner sticking to the drum where the laser beam struck |
|
|
Term
| laser printing process - fusing |
|
Definition
| uses heat and pressure to bond the toner to the paper. Until now the toner was just sitting on the paper. The bonding rollers heat up the paper causing the toner to melt to the paper |
|
|
Term
| laser printing process - transferring |
|
Definition
| a strong electrical charge draws the toner off the drum to the paper. The paper is positively charged by a black roller. Then a static charge eliminator weakens the charge on the drum and paper so the paper and drum don’t stick together. |
|
|
Term
| laser printing process - writing |
|
Definition
| : Laser beam controlled by motors and a mirror, scans across the drum until it completes the proper number of passes. The laser beam turns on and off continually as it makes passes down the drum, once for each raster line, so that dots are exposed where toner should go to print the image. The laser beam writes the image as -100V charge which is used to the developing stage to transmit toner to the drum. |
|
|
Term
|
Definition
| A 48-bit (6-byte) hard-coded hardware address unique to each NIC card or onboard network controller and assigned by the manufacturer. The address is often printed on the adapter as hexadecimal numbers. |
|
|
Term
|
Definition
| The term used by Windows for the RAID 1 level that duplicates data on one drive to another drive and is used for fault tolerance. |
|
|
Term
| NAT (network address translation) |
|
Definition
| A TCP/IP protocol that substitutes the public IP address of the router for the private IP address of the other computer when these computers need to communicate with the internet. |
|
|
Term
|
Definition
| Any computer or other device on a network that has been assigned an IP address. |
|
|
Term
| OCR (optical character recognition) |
|
Definition
| mechanical or electronic conversion of scanned images of handwritten, typewritten or printed text into machine-encoded text |
|
|
Term
| patch cable (straight through cable) |
|
Definition
| A network cable that is used to connect a PC to a hub, switch, or router |
|
|
Term
| PDA (personal digital assistant) |
|
Definition
| is a mobile device that functions as a personal information manager. |
|
|
Term
|
Definition
ICMP packet. A Windows and Unix command used to troubleshoot network connections. It verifies that the host can communicate with another host on the
network |
|
|
Term
| pits and lands (optical drives) |
|
Definition
| tiny indentations encoded in a spiral track with gaps between. |
|
|
Term
| RAID(redundant array of inexpensive disks or redundant array of independent disks) |
|
Definition
| Several methods of configuring multiple hard drives to store data to increase logical volume size and improve performance, or to ensure that if one hard drive fails, the data is still available from another hard drive. |
|
|
Term
|
Definition
| Using space from two or more physical disks to increase the disk space available for a single volume. Performance improves because data is written evenly across all disks. |
|
|
Term
|
Definition
| A type of drive imaging that duplicates data on one drive to another drive and is used for fault tolerance. |
|
|
Term
|
Definition
| A technique that stripes data across three or more drives and uses parity checking, so that if one drive fails, the other drives can re-create the data stored on the failed drive. RAID 5 drives increase performance and provide fault tolerance. |
|
|
Term
|
Definition
| A phone line connection found on modems, telephones, and house phone outlets. |
|
|
Term
| RJ-45 (RJ=registered jack) |
|
Definition
| A port that looks like a large phone jack and is used by twisted-pair cable to connect to a wired network adapter or other hardware device |
|
|
Term
|
Definition
| A device that manages traffic between teo or more networks and can help find the best path for traffic to get from one network to another. |
|
|
Term
|
Definition
| laser scanners use these to steer the laser beam |
|
|
Term
|
Definition
| A method of data access used by tape drives, whereby data is written or read sequentially from the beginning to the end of the tape or until the desired data is found |
|
|
Term
| shielded twisted pair (STP) |
|
Definition
| A cable that is made of one or more twisted pairs of wires and is surrounded by a metal shield |
|
|
Term
|
Definition
| A type of dynamic volume used on a single hard drive that corresponds to a primary partition on a basic disk |
|
|
Term
|
Definition
| An electronic device with no moving parts. A storage device that uses memory chips to store data instead of spinning disks (such as those used by magnetic hard drives and CD drives) |
|
|
Term
|
Definition
| A type of dynamic volume used on two or more hard drives that fills up the space allotted on one physical disk before moving to the next. |
|
|
Term
|
Definition
| In Windows XP, standby mode is similar to Windows 7/Vista sleep mode where work is saved to memory and a trickle of power preserves that memory. |
|
|
Term
|
Definition
| A device used to connect nodes on a star network topology. It also segments the network to improve network performance by deciding which network segment is to receive a packet, on the basis or the packet's destination MAC address. |
|
|
Term
|
Definition
| is a one-piece mobile computer usually with a touchscreen. |
|
|
Term
|
Definition
| The suite of protocols that supports communication on the Internet. TCP is responsible for error checking, and IP is responsible for routing. |
|
|
Term
|
Definition
| A type of line printer that uses wax-based ink, which is heated by heat pins that melt the ink onto paper. |
|
|
Term
| unshielded twisted pair (UTP) |
|
Definition
| the most popular cabling method for local networks and is the least expensive and is commonly used on LANs. The cable is made of twisted pairs of wires and is not surrounded by metal. |
|
|
Term
| USB (universal serial bus) |
|
Definition
| A type of port designed to make installation and configuration of I/O devices easy, providing room for as many as 127 daisy-chained devices. |
|
|
