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Network Fundamentals

Lesson Three - MTA Exam 98-366

568A A wiring color scheme
568B A wiring color scheme more common than the older 568A.
ad-hoc mode A wireless access mode that has clients communicate with each other without the user of a wireless access point.
Advanced Encryption Standard (AES) A wireless encryption protocol used with WPA2.
attenuation A degradation of signal as it travels.
BOGB A wiring color scheme based on blue, orange, green, and brown.
bridge mode A method in which a wireless bridge is used to connect different 802.11 standards.
category 5e A popular category of twisted pair that supports speed up to 100 Mbps.
category 6 A popular category of twisted pair that supports speeds up to 1000 Mbps.
channel bonding Two channels that do not overlap are used together in an effort to double the physical data rate.
continuity tester A device used to test a cable or wire.
crossover cable A type of patch cable—the crossover cable. This type is used to connect like devices to each other (for example, a computer to another computer), or a switch to another switch.
crosstalk A common type of interference that occurs when the signal that is transmitted on one copper wire or pair of wires creates an undesired effect on another wire or pair of wires.
data emanation An electromagnetic (EM) field that is generated by a network cable or network device, which can be manipulated to eavesdrop on conversations or to steal data.
electromagnetic interference (EMI) A disturbance that can affect electrical circuits, devices, and cables due to electromagnetic conduction and possibly radiation.
far end crosstalk A form of cross talk interference, measured at the cable end farthest from the transmitter.
Faraday cage An enclosure formed by conducting material or by a mesh of such material.
fiber optic cable A type of cable that transmits light (photons) instead of electricity, and this light is transmitted over glass or plastic.
frame aggregation A method that sends two or more frames in a single transmission.
IEEE 802.11 A standard used to ensure compatibility between devices.
IEEE 802.1X A port-based network access control used to secure wireless connection.
infrastructure mode A common wireless access mode that uses a wireless access point.
interference Anything that disrupts or modifies a signal that is traveling along a wire.
MDI Short for medium dependent interface, a type of port that does not include a crossover.
MDI-X A type of port that includes a crossover connection.
multi-mode A type of fiber optic cable that has a larger fiber core capable of carrying multiple rays of light.
Multiple-Input Multiple-Output (MIMO) A method that uses multiple antennas, increasing the number of signals for increased bandwidth.
near end crosstalk A form of cross talk that is measured interference between two pairs in a single cable, measured on the cable end nearest the transmitter.
plenum-rated A type of cable that has a Teflon coating that makes them more impervious to fire.
punch down tool A tool used to terminate twisted pair cable to a patch panel.
radio frequency interference (RFI) An interference that can come from AM/FM transmissions and cell phone towers.
service set identifier (SSID) A mechanism used to identify wireless networks.
single mode A type of fiber optic table that is meant to carry a single ray of light.
shielded twisted pair (STP) A twisted pair cable that has an aluminum shield inside the plastic jacket that surrounds the pairs of wires.
straight through cable The most common type of patch cable, it is the type that you would use to connect a computer to a central connecting device like a switch. It is called “straight through” because the wires on each end of the cable are oriented in the same way.
Temporal Key Integrity Protocol (TKIP) A type of wireless encryption used with WPA.
TIA/EIA Short for Telecommunications Industry Association/Electronics Industries Alliance, a standards and trade organization composed as an alliance of trade associations for electronics manufacturers in the United States.
twisted-pair cable The most common of all copper-based cables. A single twisted-pair cable has eight wires; they are copper conductors that transmit electric signals. These eight wires are grouped into four pairs.
Wi-Fi A trademarked term for WLAN.
Wi-Fi Protected Access (WPA) An interim encryption protocol used with wireless networks; replaced WEP.
Wired Equivalent Privacy (WEP) The first wireless encryption protocol. Since it is considered a weak encryption, it is not recommended.
wireless access point (WAP) A wireless device that also acts as a router, firewall, and IP proxy.
wireless bridge A type of wireless repeater that connects different 802.11 standards.
wireless LAN (WLAN) A network composed of at least one WAP and at least one computer or handheld device that can connect to the WAP.
wireless network adapter A wireless adapter used to connect to a wireless access point or other wireless network adapter.
wireless repeater A wireless device used to extend the coverage of a wireless network.
Created by: ctrader