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CUT5 6.2

Computers: Understanding Tech 5e 6.2

communications medium A connection that enables computers in different locations to send data to one another.
twisted-pair cable A cable that consists of pairs of copper wires, in which each wire is individually wrapped in plastic and all the wires are bound together by another plastic casing.
electromagnetic interference (EMI) The magnetic field generated when electricity passes through a wire.
shielded twisted-pair (STP) cable A type of twisted-pair cable used in environments where electromagnetic interference (EMI) might be a problem, such as for a cable that passes over a fluorescent light fixture in a ceiling.
unshielded twisted-pair (UTP) cable A type of twisted-pair cable that does not have magnetic shielding on the outside. UTP cable is available in different categories, such as Cat5 (meaning “category 5”).
coaxial cable A type of cable that consists of an insulated copper center wire grounded by a shield of braided wire; commonly used for cable TV connections, in telephone networks, and in some computer networks.
fiber-optic cable A type of cable that uses a string of glass to transmit data using patterns of photons (beams of light).
network backbone The central pathway of a network.
T line Any of several types of digital high-speed, long-distance telephone lines that are capable of carrying multiple types of signals, including both voice and data.
T1 line A T line that carries data at 1.5 Mbps over its 24 internal lines, with each line running at 64 Kbps.
T3 line A T line that contains a bundle of 672 individual lines. Working collectively, these lines can transfer data at up to 43 Mbps.
wireless media Wireless technologies that transmit information through the air.
Wi-Fi The wireless form of Ethernet.
IEEE 802.11 The IEEE standard number for wireless Ethernet (Wi-Fi). IEEE stands for Institute of Electrical and Electronics Engineers—the organization that maintains the standards for various types of computer and communication technologies.
band A frequency range.
wireless access point A hardware device that communicates wirelessly with Wi-Fi capable devices.
infrastructure mode A communication mode in which a Wi-Fi device connects to a wireless access point.
ad hoc mode A communication mode in which two computers connect to one another via Wi-Fi directly without an access point.
WiMAX A wireless technology that has a larger usable range than Wi-Fi, is based on the IEEE 802.16 standard, and is suitable for blanketing a small metropolitan area with wireless coverage.
Bluetooth A short-range wireless networking standard used to connect peripheral devices to computers, tablets, and smartphones.
cellular technology A wireless communication technology that uses antenna that cover areas of 10 to 12 square miles to provide mobile phone service and Internet service.
cell In networking and communication: A wireless cellular calling area, which has its own antenna encompassing an area approximately 10 to 12 square miles in diameter.
3G Acronym for 3rd generation. A class of mobile broadband service that provides about 3 Mbps throughput.
4G Acronym for 4th generation. A class of mobile broadband service that is capable of around 9.5 Mbps throughput.
communications satellite A solar-powered electronic device positioned in the Earth’s outer atmosphere in geosynchronous orbit, containing several transponders.
transponder A transmitter and receiver that receives signals from a transmission station on the ground called an earth station and rebroadcasts them to a different earth station.
earth station A transmission station on the ground that sends signals to satellite transponders.
geosynchronous orbit An orbit around the Earth that has the same movement as the Earth itself, making objects in this orbit appear stationary when viewed from the ground.
latency A delay involved in communication that limits the performance of the communication medium.
microwave system A high-frequency waveform radio signal used to carry data securely from one point to another.
infrared technology A wireless technology that transmits data as light waves, rather than radio waves.
IrDA The standard for infrared wireless communication. IrDA is short for Infrared Data Association, the organization that developed the standard.
Created by: softcrylic