Glossary

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zero code suppression	Line coding scheme used for transmission clocking. Zero line suppression substitutes a one in the seventh bit of a string of eight consecutive zeros. See also ones density.
ZIP	Zone Information Protocol. AppleTalk session layer protocol that maps network numbers to zone names. See also ZIP storm and zone.
ZIP storm	Broadcast storm that occurs when a router running AppleTalk propagates a route for which it currently has no corresponding zone name. The route is then forwarded by downstream routers, and a ZIP storm ensues. See also ZIP.
zone	In AppleTalk, a logical group of network devices. See also ZIP.
Zone Information Protocol	See ZIP.
Zone multicast address	Data-link-dependent multicast address at which a node receives the NBP broadcasts directed to its zone.



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