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| connections provided by telephone and cable tv companies, 1 million bits per second |
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| contained within most modern computers; many have built already into mother-board |
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routes and manages communications on the network and coordinates resources.
Windows Server, Linux, Novell NetWare |
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| devices that connect network components sending packets of data to other connected devices |
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| more intelligent then a hub; filter and forward data to a specified destination |
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| special communications processor used to route packets of data through different networks |
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| distributed computing model; processing power located within clients, desktops, laptops, hand held devices |
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| method of slicing digital messages into parcels called packets; sending along different paths as they become available |
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| transmission control protocol/internet protocal |
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| establishes a connection between computers, sequences the transfer of packets, and acknowledges packets sent |
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| responsible for the delivery of packets including disassembling and reassembling. |
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| enables client application programs to access the other layers; defines protocols that applications use to exchange data. |
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| responsible for providing application layer with communication and packet services |
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| responsible for addressing, routing and packaging data packers called IP datagrams. |
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| responsible for placing packets on and receiving them from the network medium |
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| discrete, binary waveform |
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| continuous waveform passing through a communications medium |
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| Half mile to 500 meter radius; links all computers in one building |
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| up to 1000 meters; college campus or corporate facility |
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| Metropolitan Area Network |
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Definition
| City or metropolitan area |
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| transborder or global area |
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| description of LAN in terms of the way components are connected together |
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| all devices on the network connect to a single hub |
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| one station transmits signals which travel in both directions along a single transmission agent |
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| connects network components in a closed loop |
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| Metropolitan Area Network |
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Definition
| network spanning metropolitan area; between WAN and LAN |
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Definition
| strands of copper wire twisted in pairs 1gbps |
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| thickly insulated copper wire; larger transmission volume than twisted wire |
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| bound strands of clear glass fiber as thick as a human hair. Data are transformed into pulses of light |
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| terrestrial and celestial, transmit high-frequency radio signals through the atmosphere and are used for high volume, long distance, point to point communication |
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| Internet Service Provider |
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Definition
| commercial organization with a permanent connection to the internet; sell temporary connections to retail subscribers |
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| operate over existing telephone lines |
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| Cable Internet Connections |
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Definition
| digital cable coaxial lines to deliver internet access to homes and businesses |
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| Internet Protocol Address |
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Definition
| 32 bit number represented by four strings of numbers ranging from 0 to 255 |
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| converts IP addresses to to domain names |
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| English like name that corresponds to the unique 32-bit IP address |
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| aircanada, coogle, pearsoned |
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Hosts, particular sections
ie: sales.google.com |
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| transferring files from computer to computer |
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| Logging on to one computer system and doing work as though the user was working on a distant computer |
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| (VoIP) delivers voice information in digital form using packet switching |
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| merging disparate communications modes into a single, universally accessible service |
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| secure, encrypted, private network that has provides firms with secure and encrypted communications at a lower cost |
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| Hypertext Transfer Protocol |
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Definition
| communications standard used to transfer pages on the web. allows computer to request web pages stored on an internet host. |
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| the directory path and document name collectively. Tells the browser software where to look for the information. |
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Definition
| refers to meaning; most of web content is designed for humans to read; computer can discover term in web document but do not really understand the meaning. |
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| Personal Digital Assistants |
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| small, hand held computers featuring applications such as schedulers, address books, etc. |
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| PDA's with email, wireless access to internet, voice communication |
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Definition
| more powerful cellular network; transmission from 144kbps or 2mbps |
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| Radio Frequency Identification |
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Definition
| tiny tags embedded with microchips containing data about an item; transmits radio signals to RFID readers. |
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| Components of a Computer Network |
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Definition
Network Interface Card
Network Operating System
Dedicated Server Computer
Hubs
Routers |
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| Layers of TCP/IP Networking |
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Definition
Application Layer (HTTP)
Transport Layer (TCP)
Internet (IP)
Network Interface Layer |
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Definition
Local Area Network (500m)
Campus Area Network (1000m)
Metropolitan Area Network (City/Metro area)
Wide Area Network (transcontinental or global) |
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