December 2001
Intermediate to advanced
656 pages
27h 19m
English
Content preview from Networking Explained, 2nd Edition
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Chapter 8: Ethernet, Ethernet, and More Ethernet 323
is, time-sensitive data such as multimedia applications and real-time video and audio for
video conferencing. To guard against high-priority data transmissions from monopolizing
a network, VG hubs are designed with a watchdog protocol that monitors the “wait time”
of pending normal-priority request. All normal-priority requests that have been waiting
between 200 ms and 300 ms have their priority label changed automatically from normal
to high. They are then placed on the hub’s high-priority list and processed in port-order
fashion. Thus, all normal-priority data are guaranteed access to the network. ...
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