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92 Cards in this Set
- Front
- Back
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10Base2, Thinnet, Thinwire, Cheapernet
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Designation for 802.3 Ethernet thin coaxial cable. Max cable segment length of 200 meters.
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10Base5, Thicknet, Thickwire
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Designation for 802.3 Ethernet thick coaxial cable.Max cable segment length of 500 meters.
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10BaseT
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Designation for 802.3 Ethernet twisted pair cable. Max cable segment length around 100 meters... but precise measurement depends on the maker's testing results for said cable
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802.11 Wireless Networking Standard
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An IEEE standard for wireless networking. The first version appeared in late 1997.
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Access point device
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The device that bridges wireless networking components and a wired network. It moves traffic between the wired and wireless sides as needed.
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American National Standards Institutee (ANSI)
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The U.S representative in the International Organization for Standardization (ISO), a world wide standards making body. Creates and publishes standards for networking, communications and programming languages.
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Amplifiers
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Hardware devices that increase the power of electrical signals to maintain their original strength when transmitted across a large network
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Analog
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The method of signal transmission used on broadband networks. Requires both a a-to-d and d-to-a converter to convert back and forth from analog to digital.
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Antenna
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A tuned electromagnetic device that can send and receive broadcast signals at particular frequencies. An important part of a device's sending and receiving circuitry.
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Attached resource computing network (ARCnet)
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A 2.5 Mbps LAN technology created by DataPoint Corp in the late 1970s.Uses token-based networking technology and runs over several kinds of coaxial cable, twisted pair and fiber optic cable.
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Attenuation
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The weakening of a signal as it travels the length of a medium, which eventually causes the signal to be unreadable.
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Backbone cabling
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The part of a cable plant that interconnects telecommunications closets and equipment rooms. Runs between floors or wings of a building and between buildings to carry network traffic destined for devices outside the work area.
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Bandwidth
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Range of frequencies that a communications medium can carry. Or...The amount of data that can be transmitted in a fixed amount of time. For digital devices, the bandwidth is usually expressed in bits per second(bps) or bytes per second. For analog devices, the bandwidth is expressed in cycles per second, or Hertz (Hz).
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Baseband transmission
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Digital signals sent over a cable without modulation. Sends binary pulses of different voltage levels. A single, fixed frequency. Devices use ONE CHANNEL at a time. A signal takes up the entire amount of bandwidth for the transmission.
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Bend radius
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For network cabling, it's the max arc that a segment can be bent over some unit length (typicall a ft or m) without causing damage.
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Broadband optical telepoint networks
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An implementation of infrared wireless networking that supports broadband services equal to those a cabled network provides.
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Broadband transmission
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Analog transmission using MULTIPLE CHANNELS at once. Continuous range of values via electrical or optical waves. More common with WANs. Signal flows ONE WAY, so needs 2 channels to send and receive.
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Cable modem
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A special-purpose networking device that permits a computer to send and receive networking signals, primarily for Internet access, by using two data channels on a broadband CATV network (one for outgoing data, one for incoming). Support bandwidth up to 1.544 Mbps.
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Cable plant
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The combo of installed network cables, connectors, patch panels, wall jacks and other media components.
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Chips
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Fixed-size elements of data broadcast over a single frequency by using direct-sequence modulation.
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Cladding
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A nontransparent layer of plastic or glass material inside fiber-optic cable; surrounds the inner core of glass or plastic fibers. Provides rigidity, strength, and a manageable outer diameter.
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Coaxial cable, "Coax"
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Type of cabling that uses a center conductor, wrapped by an insulating layer and surrounded by a braided wire mesh and an outer jacket or sheath, to carry high-bandwidth signals, such as network traffic or broadcast tv frequencies.
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Communications carrier
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A company providing communications services for other orgs, such as a local phone company and long distance telephone carriers. Most mobile computing technologies rely on the services of one to handle wireless traffic from mobile units to a centralized server.
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Conduit
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Plastic or metal pipe laid specifically to provide a protected enclosure for cabling of any kind.
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Crosstalk
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A phenomenon that occurs when two wires lay against each other in parallel alignment. Signals traveling down one wire can interfere with signals traveling down the other, and vice versa.
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Datagrade
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A designation for cabling of any kind; indicates that cabling is suitable for transporting digital data. When applied to twisted pair cabling & it's standards, it indicates that the cable is suitable for voice or data traffic.
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Differential signal
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The use of two wires to carry a signal, where one wire carries a positive voltage signal and the other carries a negative voltage signal. Help to mitigate the effects of noise and crosstalk.
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Direct-sequence modulation
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The form of spread-spectrum (wireless) data transmission that breaks data into fixed-length segments called chips and transmits the data on multiple frequencies.
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Dual-cable broadband
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A broadband technique in which 2 cables are used; one for transmitting and one for receiving.
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Electromagnetic Interference (EMI)
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A form of interference, also referred to as "noise", caused by emissions from external devices, such as transformers or electrical motors, that can disrupt network transmissions over an electrical medium.
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Electronic eavesdropping
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The capability to "listen" to signals passing through a communications media by detecting its emissions. Easy on many wireless network technologies because data is broadcast into the atmosphere.
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Electronic Industries Alliance (EIA)
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An industry trade group of electronics and networking makers that collaborates on standards for wiring, connectors, and other common components.
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Entrance facility
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The location of the cabling and equipment that connects a corporate network to a third party telecommunications provider.
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Equipment room
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An area that serves as a connection point for backbone cabling running between telecommunications closets; also houses servers, routers, switches and other major network equipment.
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Extended LANs
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Microsoft's name for the networks resulting from certain wireless bridges' capability to expand the span of a LAN up to 25 miles.
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Federal Communications Commission (FCC)
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Regulates access to broadcast frequencies throughout electromagnetic spectrum, including those used for mobile computing and microwave transmissions. If signal covers over .5 miles and require exclusive use, a license is then required.
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Fiber-optic
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Cabling technology that uses pulses of light sent along a light-conducting fiber at the heart of the cable to transfer info from sender to receiver. Can send data in only ONE DIRECTION, so 2 cables required to permit network devices to exchange data in both directions.
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Frequency hopping
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The type of spread-spectrum (wireless) data transmission that switches data across a range of frequencies over time. The transmitters and receivers must be synchronized to hop at same time at same frequencies.
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Geosynchronous
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An orbital position relative to earth where a satellite orbits at the same speed as earth rotates, permitting satellites to maintain a constant fixed position in relation to earth stations and represents the positioning technique used for microwave satellites.
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Hertz (Hz)
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A measure of broadcast frequencies in cycles per second; named after Heinrich Hertz, one of the inventors of radio communications.
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Horizontal wiring
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Network cabling that runs from the work area's wall jack to the telecommunications closet and is usually terminated at a patch panel.
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Hot spots
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Wireless networking term for areas in which wireless access to a network or the Internet is possible. Often, these areas are in nontraditional locations, such as outside cafes or courtyards.
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Infrared
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The portion of the electromagnetic spectrum immediately below visible light. Popular for short-to-medium range (10 m - 40 m) point-to-point network connections.
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Insertion loss
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The weakening of signals that occurs on a cable segment each time a network device is attached. Requires limitations for # of devices to be connected
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Institute of Electrical and Electronics Engineers (IEEE)
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An engineering org that issues standards for electrical and electronic devices, including network interfaces (NICs), cabling, and connectors.
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IrDA devices
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Devices compliant with Infrared Device Association's specifications for infrared components and devices.
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Jack couplers
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The female receptacles into which modular TP cables plug.
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Latency
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The amount of time a signal takes to travel from one end of a cable to the other.
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Light emitting diodes (LEDs)
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A lower-powered alternative for emitting data at optical frequencies. Sometimes used for Wireless LANs and for short-haul, fiber-optic-based data transmissions
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line-of-sight networks
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Networks requiring an unobstructed view or clear line of sight between the transmitter and receiver. Narrowband (type of wirelesss) tight-beam transmitters and receivers must have an unobstructed path between them.
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Locking connection (LC)
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A type of fiber optic connector that pushes on and pulls off using an RJ-45 style latching mechanism.
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Maximum segment length
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The longest cable segment that a particular networking technology permits. Limitation helps network designers and installers make sure the entire network can send and receive signals properly.
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Mechanical Transfer Registered Jack (MT-RJ)
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A fiber optic connector that provides a high-density connection using 2 fiber optic cables.
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Medium interface connector (MIC)
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One of a number of fiber optic cable connector types. MIC connectors feature a separate physical connector for each cable in a typical fiber optic cable pair.
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Mid-split broadband
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Broadband technique in which 2 channels on different frequencies are used to transmit and receive signals via a single cable.
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Mobile computing
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Form of wireless networking that uses common carrier frequencies to permit networked devices to be moved freely within the broadcast coverage area yet remain connected to the network.
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Narrowband radio, Single frequency radio
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A type of broadcast-based networking technology that uses a single specific radio frequency to send and receive data. Low powered limited to about 250 ft, high powered require FCC approval and are 250 ft +
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Patch cable
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A short length (1-20 ft) of network cable used to connect a computer's network interface card to a jack in the work area or to connect from a patch panel to a hub or switch in the wiring closet.
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Patch panels
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Elements of a wiring center in which separate cable runs are brought together. By making connections between any two points on the patch panel, the physical path of wires can be controlled and the sequence of wires easily managed.
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Plenum-rated
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Cable that has been burn-tested to make sure it doesn't emit toxic fumes or large amounts of smoke when incinerated. Most building and fire codes require this designation for any cable to be run in plenum space.
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Radio frequency interference (RFI)
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Any interference caused by signals operating in the radio frequency range. This term has become generic for interference caused by broadcast signals of any kind.
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Reflective wireless networks
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An infrared wireless networking technology that uses a central optical transceiver to relay signals between end stations. All devices must have an unobstructed view of this central transceiver, which explains why they are usually mounted on the ceiling
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Registered jack 45 (RJ-45)
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The eight wire modular jack used for TP networking cables and PBX-based telephone systems
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Repeaters
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Networking devices used to strengthen a signal suffering from attenuation
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RJ-11
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The four wire modular jack commonly used for home telephone handsets
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Satellite Microwave
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A microwave transmission system that uses geosynchronous satellites to send and relay signals between sender and receiver. Most companies that use satellite microwave lease access to the satellites for an exorbitant fee.
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Scatter infrared networks
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Infrared LAN technology using flat reflective surfaces, such as walls and ceilings, to bounce wireless transmissions between sender and receiver. Bouncing creates delays & attenuation - this wireless LAN is slowest and supports narrowest bandwidth of any infrared tech
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Sheath, Jacket
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Outer layer of coating on a cable
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Shielded twisted pair (STP)
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Variety of TP cable in which a foil wrap enclo0ses each of one or more pairs or wires for additional shielding, and a wire braid or an additional layer of foil might enclose the entire cable for further shielding
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Shielding
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Any layer of material included in cables to mitigate the effects of interference on the signal-carrying cables it encloses
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Spread-spectrum radio
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Wireless networking technology that passes data by using multiple frequencies at once
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Straight Connection (SC)
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Type of one piece fiber optic connector that's pushed on yet makes a strong and solid contact with emitters and sensors
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Straight Tip (ST)
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Most common type of fiber optic connector used in Ethernet networks with fiber backbones. Come in pairs, one for each fiber optic cable.
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Structured cabling
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A specification for how network media should be installed to maximize performance and efficiency
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Sub-miniature type A (SMA)
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Another fiber optic connector that twists on and comes in pairs
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Telecommunications closet, (TC), "telco" room, telecommunications closet, distribution facility, wiring closet
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A small room or area housing equipment such as patch panels hubs and switches that provides connectivity to computer equipment in the nearby work area
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Telecommunications Industries association (TIA)
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An industry consortium of telephone equipment, cabling and connectors used in phone systems and on networks
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Terrestrial microwave
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Wireless microwave networking technology using a line-of-sight communication between pairs of earth-based transmitters and receivers to relay info. Must be way high up to work. Quite expensive.
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Transceiver
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A compound word made from the words "transmitter" and "receiver" to describe a device that combines the functions of a transmitter and a receiver and integrates into a single device the circuitry needed to emit and receive signals on a medium. A NIC is one.
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Twisted pair (TP)
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Type of cabling where 2 copper wires, each enclosed in some kind of sheath, are wrapped around each other. Twisting permits narrow-gauge wire, otherwise sensitive to crosstalk and interference, to carry higher bandwidth signals over longer distances than is normally possible with straight wires. Also used for voice, not just data.
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Unshielded twisted pair (UTP)
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A form of TP cable that includes no additional shielding material in the cable composition. This cable encloses one or more pairs of twisted wires inside an outer jacket.
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Virtual docking
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One of numerous point-to-point wireless infrared technologies that enables portable computing devices to exchange data with desktop machines or allow data exchange between a comp and hand-held device or printer. "Virtual" used because this capability replaces a cable between the two devices.
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Voicegrade
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A designation for cable, usually TP, that indicates it's rated to carry only telephone traffic. This type of cable not recommended for network use.
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Wall plates
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A modular plate used to accommodate numerous outlets used for networking and voice applications.
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Wireless
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A network connection that depends on transmission at an electromagnetic frequency through the atmosphere to carry data transmissions from one networked device to another
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Copper based cable
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All main cables except fiber optic. UTP, STP, Coaxial.
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Thin client
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Boots and runs applications and accessing data all happens off the server instead of loaded from the hard-disk. Lower cost client machine. More secure. Virus free no matter what. But, requires more bandwidth when enabled.
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Wireless bridges
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A pair of devices, typically narrow-band and tight beam, that relay network traffic from one location to another. Bridges that use spread-spectrum radio, infrared, and laser techs are available and can span distances from hundreds of meters up to 25 miles.
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Wireless Fidelity (Wi-Fi)
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A term used to indicate wireless networking, usually using one of the 802.11 wireless networking standards.
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Wiring center
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A set of racks with associated equipment that generally includes hubs, patch panels, backbone access units, and other network management equipment, which brings TP wired network cables together for routing, management and control.
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Work area
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The space in a facility or office where computer workstations and other user devices are located.
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Worldwide Interoperability for Microwave Access (WiMax)
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A wireless tech designed for wireless metropolitan area networks defined in standards 802.16-2004 and 802.16e
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