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36 Cards in this Set
- Front
- Back
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The internet vs. The web
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Web uses the internet to provide us with pages we understand. Runs on top of TCP/IP with HTTP
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TCP/IP
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Transmission Control Protocol/Internet Protocol. used for internet (server to server) gets from one IP address to another
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Unix
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first operating system. had to be released to public (open source) by law. Could not patent it
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Linux
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rewrote Unix operating system for PC's or small systems. Open Source
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Tim Berners Lee
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Invented the web
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Linus Torvalds
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invented Linux
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PAN
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Personal Area Network. computer network used for communication among computer devices close to one person
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LAN
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Land Area Network. access the internet from your organizations LAN (small geographic region - one house, building)
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MAN
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metropolitan area network (covers, city, small town)
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WAN
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Wide Area Network. network generally provided by common carriers, that covers a wide geographic area (the internet, shaw)
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The backbone
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the primary connections and telecommunication lines that link computers and organizational nodes on the internet
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Backbone networks
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high-speed central networks to which multiple smaller networks, such as LAN, connect.
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Bandwidth
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transmission capacity of a network stated in bits per second. Higher frequency = more LOS, shorter, more data, direct. Lower frequency = loss LOS, further, less data, signals bounce.
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VPN
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virtual private network
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ISP
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Internet service provider. company offers internet connections for free
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IP address
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Internet protocol address. each computer has assigned address that distinguishes from all other computers
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IP
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internet protocol. set of rules responsible for disassembling, delivering and reassembling packets over the internet
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DNS
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Domain Name System. consist of multiple parts that are read from right to left separated by dots
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URL
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Uniform resource locator. points to the address of a specific resource on the web
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Browsers
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users access the web primarily through software applications called browsers. Provide a graphical front end that enables users to point and click their way across the web.
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XML
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extensible markup language. a more powerful and flexible markup language than HTML
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HTTP
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hyper text transport protocol. protocol of the web
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HTTPS
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communication protocol for secure communication over a computer network. It provides authentication of the visited website and to protect the privacy and integrity of exchanged data.
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GPS
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global positioning satellite. wireless system that uses satellites to enable users to determine their position anywhere on earth.
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GEO satellites
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geostationary satellites
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MEO satellites
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medium earth orbit
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LEO satellites
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low earth orbit
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Footprint
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the area of the earths surface reached by a satellite transmission
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WIFI
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wireless fidelity. medium range wireless local area network. allows electronic devices to exchange data or connect to internet wirelessly
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Hotspot
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wireless access point provides service to a number of users within a small geographic perimeter
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Propagation delay
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any delay in communication due to signal transmission time through a physical medium
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UPC
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universal product code. typical bar code made up of 12 digits that batched in various groups
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QR code
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two dimensional code. readable by dedicated QR readers and camera phones
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VoIP
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Voice over Internet protocol. phone calls are treated as just another kind of data. analogue voice signals digitized, sectioned into packets and then sent over the internet. ex.skype
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Portal
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web based personalized gateway to info and knowledge that provides relevant info from different IT system (corporate, industrywide, affinity, commercial (public)) ie. webpage
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again….
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ergh
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