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This Concept Map, created with IHMC CmapTools, has information related to: ch3 netw case, Ethernet include ethernet efficiency, Ethernet include ethernet for real time and quality of service critical applications switches are the majority of issues here since ethernet installations are now based on MAC level swtitches, Case studies: Ethernet, Wifi, Bluetooth & ATM point to Ethernet, Case studies: Ethernet, Wifi, Bluetooth & ATM point to Asynchonous transfer mode networks ATM has been designed to carry a wide variety of data including multimedia data such as voice and video. it has a fast packet switching network based on a method of packet routing known as cell relay, which can operate much faster than conventional packet switching, Bluetooth wireless personal area network that emerged from the need to link pda's, laptops and mobile phones contains Association protocol to conserve energy, devices remain asleep or standby mode before any associations are made or when no recent communication has occured, Case studies: Ethernet, Wifi, Bluetooth & ATM point to Bluetooth wireless personal area network that emerged from the need to link pda's, laptops and mobile phones, Ethernet include physical emplemeentations, Ethernet include packet collisions carrier sensing: the interface hardware in each station listens for the presence of a signal, known as the carrier collision detection: produces a jamming signal to all stations stating a collision has occured back off: stations involved in the collision use a algorithm that randomly chooses a time to resend message, Ethernet include Packet broadcasting the method of communication in CSMA/CD networks is by broadcasting packes of data on the transmission medium, all stations are continously listening tot he medium for packets that addressed to them, Case studies: Ethernet, Wifi, Bluetooth & ATM point to WIFI is intended to support communication between computers located with about 150 meters of each other up to speeds of 54 Mbps, Ethernet include ethernet packet layout or frames transmitted by stations on the ethernet have the following from left to right: preamble, S, destination address, source address, length of data, data of transmission and checksum