computer network, set of independent systems interconnected by communication links for the purpose of sharing information and resources, node, individual computer on a network (can be a phone to a super computer), gigabit ethernet, the fastest networking technology for data communication today, bandwidth, rate at which information can be sent and received across a network, dial-up, slowest networking tech for data communication, PAN, Personal Area Network - BlueTooth, LAN, Local Area Network - close geological proximity, WLAN, Wireless Local Access Network - WiFi, MAN, Metro Area Network - few blocks of a city; LAN < MAN < WAN, WAN, Wide Area Network - spans a large geographic distance, bus, single communication line - has a MAX due to collision detection scheme, repeater, device that amplifies and forwards a signal, bridge, "smarter" device that has knowledge of the nodes on each bus or LAN, switch, multi-part device that uses packets switching to forward data to appropriate destination, packet, information block with a fixed maximum size that is transmitted through the internet as a single unit, digital footprint, information about a person on the internet as a result of their online activity, meta data, data that describes another set of data, authentication, verifying the user is truly who they say they are; managed by the OS - user ID and password, OS protects passwords by..., encrypting it for a given user and converting it into a representation that can't be understood without the appropriate algorithm, encryption, How the OS protects passwords (it's like a letter written in a secret language), hashing, applying a mathematical one-way function to create a "signature" of the input; different inputs can make the same output, one-way function, can be used one way easily, but VERY hard to use it the other direction, protocol, a mutually agreed-upon set of rules, conventions, and agreements for the efficient and orderly exchange of info, tautology, a boolean expression that is never false
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Chapter 7 8 - CSCI101
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Hharling
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CS
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