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Node(Latin nodus ‘knot’) is critical element of any computer network.
Definition
A point in a network at which lines intersect or branch. A device attached to a network.[1] A terminal or other point in a computer network where a message can be created, received, or transmitted[2]
Examples A node is any device connected to a computer network. Nodes can be computers, personal digital assistants (PDAs), cell phones, or various other network appliances. On an IP network, a node is any device with an IP address.[3]If the node is a computer it is more often called a "host".
In Network A node is a connection point, either a redistribution point or an end point for data transmissions. In general, a node has programmed or engineered capability to recognize and process or forward transmissions to other nodes.
If the network in question is the Internet, every node must have a MAC address or Data Link Control address[4] if it is at least an OSI model layer 2 device In computer networking a Media Access Control address (MAC address) or hardware address or adapter address is a quasi-unique identifier attached to most network adapters (NICs). ...
In the OSI networking model, Data Link Control (DLC) is the service provided by the data link layer. ...
The Open Systems Interconnection Basic Reference Model (OSI Reference Model or OSI Model for short) is a layered, abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnection (OSI) initiative. ...
If the network in question is a peer-to-peer or overlay network, nodes that actively route data for the other networked devices as well as themselves are called supernodes. A peer-to-peer (or P2P) computer network is a network that relies on the computing power and bandwidth of the participants in the network rather than concentrating it in a relatively few servers. ...
An overlay network is a computer network which is built on top of another network. ...
In peer-to-peer networking, a supernode works as one of that networks relayers and proxy servers, handling data flow and connections for other users. ...
Network node (NN) A grouping of one or more network elements (at one or more sites) which provides network related functions, and is administered as a single entity. A single site may contain more than one network node. For the purpose of this glossary, a network node is considered synonymous with a network element, and is usually at a single site. This restriction simplifies the definition of the network node interface (NNI) and INI, which would not apply between network elements.
In general terms A node is a specific location in a telecommunication network. In Cable TV systems (CATV), this term has assumed a broader context and is generally associated with a Fiber Optic Node. A fiber optic node is those homes or businesses within a specific geographic area that are served from a common fiber optic receiver. A fiber optic node is generally described in terms of the number of Homes Passed that are served by that specific fiber node.
References - ^ AskOxford
- ^ encarta
- ^ about.com
- ^ Webopedia
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