COMM 226 Lecture Notes - Lecture 6: Internet Engineering Task Force, Cable Modem, Symmetric Digital Subscriber Line
18 Sep 2017
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Document Summary
)f it weren"t for networks we would not be able to use any technologies: you use networks everyday, computing devices more useful when connected to networks. Lan is in a single location: wide area networks (wan): connect computers at different geographical locations, cannot place communication lines wherever you want (like in different cities) but they are in multiple sites. Ieee 802. 3, or ethernet, protocol: all devices on lan must use the same protocol. Indoor or outdoors: weather, obstructions such as steel or concrete pillars, repeaters/reflectors: used to amplify and reflect signals to extend the range. Why is mobile computing important: computers are more likely to be portable laptops, new smartphone is being used more often when you are on the go, m-commerce: smartphone applications. Smartphone basics: most operate on 3g (third-generation) network, higher data transfer rates compared to 2g, allows simultaneous voice and data transfer, 4g has already been deployed, mobile os.
