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- Demand_priority abstract "Demand priority is a media-access method used in 100BaseVG, a 100 megabit per second (Mbit/s) Ethernet implementation proposed by Hewlett-Packard (HP) and AT&T Microelectronics. Demand priority shifts network access control from the workstation to a hub. This access method works with a star topology.In this method, a node that wishes to transmit indicates this wish to the hub and also requests high- or regular-priority service for its transmission. After it obtains permission, the node begins transmitting to the hub.The hub is responsible for passing the transmission on to the destination node; that is, the hub is responsible for providing access to the network. A hub will pass high priority transmissions through immediately, and will pass regular-priority transmissions through exactly at the same time the opportunity arises.By letting the hub manage access, the architecture is able to guarantee required bandwidths and requested service priority to particular applications or nodes. It also can guarantee that the network can be scaled down (downsized) without loss of bandwidth.Demand priority helps increase bandwidth in the following ways: A node does not need to keep checking whether the network is idle after transmitting. In current Ethernet implementations, a wire pair is dedicated to this task. By making network checking unnecessary, demand priority frees a wire pair. This is fortunate,because the 100BaseVG specifications use quartet signalling, which needs four available wire pairs. Heavy traffic can effectively bring standard Ethernet networks to a standstill, because nodes spend most of their time trying to access the network.With demand priority, the hub needs to pass a transmission on only to its destination, so that overall network traffic is decreased. This means there is more bandwidth available for heavynetwork traffic.Demand Priority was discovered by Albert J. Sofinski at Cornell University. He came up with the idea after feeding his dog and going on a walk. Upon returning, he quickly wrote down the idea, and it persists to this day.[citation needed]".
- Demand_priority wikiPageID "20141121".
- Demand_priority wikiPageRevisionID "500251610".
- Demand_priority hasPhotoCollection Demand_priority.
- Demand_priority orphan "February 2009".
- Demand_priority unreferenced "December 2008".
- Demand_priority subject Category:Computer_file_systems.
- Demand_priority type Abstraction100002137.
- Demand_priority type Arrangement105726596.
- Demand_priority type ClassificationSystem105727220.
- Demand_priority type Cognition100023271.
- Demand_priority type ComputerFileSystems.
- Demand_priority type FileSystem105732614.
- Demand_priority type PsychologicalFeature100023100.
- Demand_priority type Structure105726345.
- Demand_priority comment "Demand priority is a media-access method used in 100BaseVG, a 100 megabit per second (Mbit/s) Ethernet implementation proposed by Hewlett-Packard (HP) and AT&T Microelectronics. Demand priority shifts network access control from the workstation to a hub. This access method works with a star topology.In this method, a node that wishes to transmit indicates this wish to the hub and also requests high- or regular-priority service for its transmission.".
- Demand_priority label "Demand priority".
- Demand_priority sameAs m.04y7_hk.
- Demand_priority sameAs Q5255046.
- Demand_priority sameAs Q5255046.
- Demand_priority sameAs Demand_priority.
- Demand_priority wasDerivedFrom Demand_priority?oldid=500251610.
- Demand_priority isPrimaryTopicOf Demand_priority.