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23 Cards in this Set
- Front
- Back
Backbone
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The backbone is the highest level in the computer network hierarchy, to which smaller networks typically connect.
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physical topologies
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Refers to the way that the various devices are connected to the network.
Star, ring, bus, hybrid networks, and mesh are all examples of physical topologies. |
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logical topologies
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A term which refers to a generated signal's actual path over a network.
Refers to the TYPE of signal running through the physical connection. |
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network operating system (NOS)
Please also name the four most popular network operating systems. |
A program that allows users and administrators to manage and access resources on a network.
Four most popular: Novell NetWare, MS Windows NT/2000/XP, UNIX, Linux. |
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UNIX
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AT&T developed the initial version of UNIX in 1969. Used as a NOS for the majority of non-PC networks. UNIX in its many forms is the dominant Internet NOS.
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Linux
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1991 Linus Torvalds decided to create his own version of UNIX for the PC, built completely within the GNU framework. Used sometimes instead of windows as a DOS, primarily a NOS.
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interoperability
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All four NOS's can communicate across a network with one another (called interoperability).
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Novell NetWare
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The most widely installed family of NOS's. Most recent version is called NetWare 6. NetWare uses standalone servers that provide LAN services (file storage, network printing, directories)
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Microsoft Windows NT, Windows 2000, Windows XP
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1999- MS intro. WIN 2000. Windows 2000 first Microsoft OS specifically designed to use TCP/IP as it's primary networking protocol, while supp. other network protocols.
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client/server model
(also called distributed computing) |
Reduces network congestion by dividing processing tasks between the client and the server.
CLIENT:System or app. that requests info SERVER: Provides info. or connections to other computers on the network. |
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Bandwidth
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Refers to the amount of data a connection can carry within a given time.
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two-tier computing
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One computer is responsible only for formatting the information on screen. The other computer is resp. for both the processing logic and data storage.
EXAMPLE: tradtional client/server relationships. |
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mesh topology
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Connects devices with multiple paths so that redundancies exist, ensuring that a connection can always be made, even if one is lost.
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ring topology
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Do not have a central connection point. A cable connects one node to another until a "ring" is formed, connecting each computer.
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Hybrid topology
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Larger networks combine elements of bus, star, ring. Hybrids allow the expansion of several existing networks by connecting them within an overall topology.
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Bus topology
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Requires that all computers (nodes) tap into the same cable.
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protocols
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rules that control network communications.
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extranet
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A network that connects enterprise intranets to the global Internet. Provides access to selected external users to expedite the exchange of products, services, and key business information.
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latency
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The delay caused when data is sent between two computers. Each computer wastes time to communicate, when that time could be used for actual computations.
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open source computing
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The act of providing free source code to the development community-at-large to develop a better product;
EXAMPLES: Apache Web server, Linux, Netscape communicator. |
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node
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Processing locations on a network such as a printer, computer, or other device.
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server-based network
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A configuration of nodes, some of which are dedicated to providing resources to other hosts on the network.
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enterprise networks
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Networks that connect all nodes in an organization, regardless of geog. location and run the organizations mission-critical applications. Can include elements of P2P and server based.
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