Signaling
Media and router performance are increasing very rapidly, so one may conclude that the time of infinite throughput is at hand. However, such is not the case. Signaling could pose a serious impediment to full use of the bandwidth that media and routing/switching will make available.
Signaling refers to the process by which an end system notifies a network that it wants service. The network responds with resources (bandwidth, buffering, and entries in databases) that allow the connection to proceed, or it notifies the end system that resources are not available. At the end of a connection, signaling is used to release resources. During a session, signaling is used to change attributes, for example, adding bandwidth, a third-party, ...
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