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blocking - Computer Definition
The intentional denying of access to a network, networked device such as a switch, router, circuit, or networked resource, such as a database.
In reference to a voice switch (see Figure B-2) or other device intentionally engineered to block some call attempts during the busiest hour of the day.This approach involves the concept of Grade of Service (GoS), which is the probability of blockage during the busy hour, expressed as a decimal fraction of the calls anticipated to be blocked. See also busy hour, GoS, and non-blocking.
A characteristic of a switch that is not able to handle simultaneous connections for all attached devices or all switch ports.