Key Terms from Chapter 3 LAN
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | 1,000,000,000 bits per second.
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| 1 kilobit per second (Kbps) | show 🗑
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| 1 megabit per second (Mbps) | show 🗑
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| 1 terabit per second (Tbps) - | show 🗑
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| 100 block | show 🗑
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| 100 pair wire | show 🗑
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| 25 pair wire | show 🗑
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| show | Part of an organization’s cross-connect facilities, a type of punch-down block used for many years to terminate telephone circuits. It does not meet Cat 5 or better standards, and so it is infrequently used on data networks.
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| alien cross talk | show 🗑
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| show | A modulation technique in which the amplitude of the carrier signal is modified by the application of a data signal.
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| amplifier | show 🗑
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| show | A measure of a signal’s strength.
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| analog | show 🗑
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| attenuation | show 🗑
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| show | A standard rating that indicates the diameter of a wire, such as the conducting core of a coaxial cable.
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| show | A measure of the difference between the highest and lowest frequencies that a medium can transmit.
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| baseband | show 🗑
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| bend radius | show 🗑
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| show | A system founded on using 1s and 0s to encode information.
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| bit (binary digit) | show 🗑
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| show | A standard for coaxial cable connectors named after its coupling method and its inventors.
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| show | A coaxial cable connector type that uses a twist-and-lock (or bayonet) style of coupling. It may be used with several coaxial cable types, including RG-6 and RG-59.
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| braiding | show 🗑
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| broadband | show 🗑
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| broadcast | show 🗑
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| byte | show 🗑
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| cable plant | show 🗑
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| Cat | show 🗑
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| Cat 3 (Category 3) | show 🗑
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| Cat 4 (Category 4) | show 🗑
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| Cat 5 (Category 5) | show 🗑
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| Cat 5e (Enhanced Category 5) | show 🗑
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| Cat 6 (Category 6) | show 🗑
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| show | A higher-grade version of Cat 6 wiring that further reduces attenuation and cross talk and allows for potentially exceeding traditional network segment length limits.
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| show | A twisted pair cable that contains multiple wire pairs, each separately shielded then surrounded by another layer of shielding within the jacket.
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| channel | show 🗑
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| cladding | show 🗑
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| coaxial cable | show 🗑
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| show | The pipeline used to contain and protect cabling. Conduit is usually made from metal.
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| connectors | show 🗑
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| core | show 🗑
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| show | A twisted pair patch cable in which the termination locations of the transmit and receive wires on one end of the cable are reversed.
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| show | A type of interference caused by signals traveling on nearby wire pairs infringing on another pair’s signal.
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| show | A type of connector with nine pins that’s commonly used in serial communication that conforms to the RS-232 standard.
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| show | A type of connector with 25 pins that’s commonly used in serial communication that conforms to the RS-232 standard.
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| show | A device, such as a multiplexer or modem, that processes signals. DCE supplies a clock signal to synchronize transmission between DTE and DCE.
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| demarcation point (demarc) | show 🗑
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| demultiplexer (demux) | show 🗑
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| show | As opposed to analog signals, digital signals are composed of pulses that can have a value of only 1 or 0.
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| show | Any end-user device, such as a workstation, terminal (essentially a monitor with little or no independent data-processing capability), or a console (for example, the user interface for a router).
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| DWDM (dense wavelength division multiplexing) | show 🗑
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| EMI (electromagnetic interference) | show 🗑
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| show | The facilities necessary for a service provider (whether it is a local phone company, Internet service provider, or long-distance carrier) to connect with another organization’s LAN or WAN.
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| F-type connector | show 🗑
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| FDM (frequency division multiplexing) | show 🗑
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| show | A short tube within a fiber-optic cable connector that encircles the fiber strand and keeps it properly aligned.
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| fiber-optic cable | show 🗑
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| FM (frequency modulation) | show 🗑
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| show | The number of times that a signal’s amplitude changes over a fixed period of time, expressed in cycles per second, or hertz (Hz).
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| show | A type of transmission in which signals may travel in both directions over a medium simultaneously. May also be called, simply, “duplex.”
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| half-duplex | show 🗑
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| show | A measure of frequency equivalent to the number of amplitude cycles per second.
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| show | A junction point between the MDF and concentrations of fewer connections- for example, those that terminate in a telecommunications closet.
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| impedance | show 🗑
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| latency | show 🗑
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| show | A connector used with single-mode or multimode fiber-optic cable.
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| show | Also known as the main cross-connect, the first point of interconnection between an organization’s LAN or WAN and a service provider’s facility.
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| show | A device that enables networks or segments using different media to interconnect and exchange signals.
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| show | A type of fiber-optic cable that contains a core with a diameter between 50 and 100 microns, through which many pulses of light generated by a light emitting diode (LED) travel at different angles.
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| show | A device that modulates analog signals into digital signals at the transmitting end for transmission over telephone lines, and demodulates digital signals into analog signals at the receiving end.
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| show | A technique for formatting signals in which one property of a simple carrier wave is modified by the addition of a data signal during transmission.
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| show | A connector used with single-mode or multimode fiber-optic cable.
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| show | A device that separates a medium into multiple channels and issues signals to each of those subchannels.
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| show | A form of transmission that allows multiple signals to travel simultaneously over one medium.
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| show | Cross talk, or the impingement of the signal carried by one wire onto a nearby wire, that occurs between wire pairs near the source of a signal.
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| show | The unwanted signals, or interference, from sources near network cabling, such as electrical motors, power lines, and radar.
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| nonbroadcast point-to-multipoint transmission | show 🗑
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| show | The degradation of a light signal on a fiber-optic network.
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| show | The nondata information that must accompany data in order for a signal to be properly routed and interpreted by the network.
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| patch cable | show 🗑
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| patch panel | show 🗑
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| show | A point or stage in a wave’s progress over time.
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| show | The area above the ceiling tile or below the subfloor in a building.
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| show | A data transmission that involves one transmitter and one receiver.
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| point-to-multipoint | show 🗑
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| populated segment | show 🗑
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| punch-down block | show 🗑
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| show | The process of retransmitting a digital signal. Regeneration, unlike amplification, repeats the pure signal, with none of the noise it has accumulated.
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| show | A device used to regenerate a signal.
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| RFI (radiofrequency interference) | show 🗑
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| RG-6 | show 🗑
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| show | A type of coaxial cable characterized by a 50-ohm impedance and a 10 AWG core. RG-8 provided the medium for the first Ethernet networks, which followed the now obsolete 10Base-5 standard.
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| RG-58 | show 🗑
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| RG-59 | show 🗑
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| RJ-11 (registered jack 11) | show 🗑
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| show | The standard connector used with shielded twisted pair and unshielded twisted pair cabling.
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| rollover cable | show 🗑
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| RS-232 (Recommended Standard 232) | show 🗑
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| show | The length of time it takes for a packet to go from sender to receiver, then back from receiver to sender. RTT is usually measured in milliseconds.
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| show | A connector used with single-mode or multimode fiber-optic cable.
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| serial | show 🗑
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| show | A cable, such as an RS-232 type, that permits serial data transmission.
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| sheath | show 🗑
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| show | A type of transmission in which signals may travel in only one direction over a medium.
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| SMF (single-mode fiber) | show 🗑
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| ST (straight tip) | show 🗑
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| statistical multiplexing | show 🗑
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| STP (shielded twisted pair) | show 🗑
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| show | A twisted pair patch cable in which the wire terminations in both connectors follow the same scheme.
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| structured cabling | show 🗑
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| show | One of many distinct communication paths established when a channel is multiplexed or modulated.
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| show | A method of multiplexing that assigns a time slot in the flow of communications to every node on the network and, in that time slot, carries data from that node.
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| telecommunications closet | show 🗑
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| show | An IEEE Physical layer standard for achieving a maximum of 10-Mbps throughput over coaxial copper cable. Thicknet is also known as 10Base-5. Its maximum segment length is 500 meters, and it relies on a bus topology.
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| Thinnet | show 🗑
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| throughput | show 🗑
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| show | A device that transmits and receives signals.
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| transmission | show 🗑
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| transmit | show 🗑
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| twist ratio | show 🗑
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| twisted pair | show 🗑
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| unpopulated segment | show 🗑
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| show | A type of cabling that consists of one or more insulated wire pairs encased in a plastic sheath.
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| vertical cross-connect | show 🗑
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| show | The measurement used to describe the degree of pressure an electrical current exerts on a conductor.
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| voltage | show 🗑
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| wavelength | show 🗑
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| show | A multiplexing technique in which each signal on a fiber-optic cable is assigned a different wavelength, which equates to its own subchannel.
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| show |
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