Unit 4 Assignment 1 Physical Layer Network Concepts
Electrical circuit - an electrical device that provides a path for electrical current to flow.
Frequency - The cycles per second of alternating current, measured in Hertz. Amplitude - The maximum difference of an alternating electric current or potential from the average value. Phase - Is a position of a point in time on a waveform cycle.
Bit time - the time it takes for one bit to be ejected from a Network Interface Card at a standard speed. Encoding scheme - used by computers to represent data as characters. unshielded twisted-pair (UTP) - Copper wiring used in small-to-large networks to connect host devices to hubs and switches.
Core - the central part of an optical fiber that provides the transmission region for an optical signal.
Cladding - A layer of optical glass surrounding the light-carrying core of an optical fiber.
Radio waves - An electromagnetic wave used for long distance communication.
Wireless WAN - A wireless wide area network, is a form of wireless network its a larger version of Wireless LAN.
Wireless LAN - A wireless local area network links two or more devices using a wireless connection.
Access point - is a device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards.