Spanning Tree Protocol

The Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them. Spanning tree also allows a network design to include spare (redundant) links to provide automatic backup paths if an active link fails, without the danger of bridge loops, or the need for manual enabling/disabling of these backup links.

Spanning Tree Protocol (STP) is standardized as IEEE 802.1D. As the name suggests, it creates a spanning tree within a mesh network of connected layer-2 bridges (typically Ethernet switches), and disables those links that are not part of the spanning tree, leaving a single active path between any two network nodes.

STP is based on an algorithm invented by Radia Perlman while working for Digital Equipment Corporation.

Read more about Spanning Tree Protocol:  Protocol Operation, Evolutions and Extensions

Famous quotes containing the word tree:

    But when the bowels of the earth were sought,
    And men her golden entrails did espy,
    This mischief then into the world was brought,
    This framed the mint which coined our misery.
    ...
    And thus began th’exordium of our woes,
    The fatal dumb-show of our misery;
    Here sprang the tree on which our mischief grows,
    The dreary subject of world’s tragedy.
    Michael Drayton (1563–1631)