In communication networks, a node is either a connection point, a redistribution point or a communication endpoint . The definition of a node depends on the network and protocol layer referred to. A physical network node is an active electronic device that is attached to a network, and is capable of sending, receiving, or forwarding information over a communications channel. A passive distribution point such as a distribution frame or patch panel is consequently not a node.

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  1. A knot, knob, protuberance or swelling.
  2. The point where the orbit of a planet, as viewed from the Sun, intersects the ecliptic. The ascending and descending nodes refer respectively to the points where the planet moves from S to N and N to S. The respective symbols are and .
  3. A stem node.
  4. A computer or other device attached to a network.
  5. A vertex or a leaf in a graph of a network, or other element in a data structure.
  6. The point at which the lines of a funicular machine meet from different angular directions; -- called also knot.
  7. The point at which a curve crosses itself, being a double point of the curve. See Crunode, and Acnode.
  8. A vertex of a graph.
  9. A hard concretion or incrustation which forms upon bones attacked with rheumatism, gout, or syphilis; sometimes also, a swelling in the neighborhood of a joint.
  10. One of the fixed points of a sonorous string, when it vibrates by aliquot parts, and produces the harmonic tones; nodal line or point.
  11. The knot, intrigue, or plot of a piece.
  12. A hole in the gnomon of a sundial, through which passes the ray of light which marks the hour of the day, the parallels of the Sun's declination, his place in the ecliptic, etc.

The above text is a snippet from Wiktionary: node
and as such is available under the Creative Commons Attribution/Share-Alike License.

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