G
LOSSARY
Glossary-6
Multicast Switching
A process whereby the switch filters incoming multicast frames for
services for which no attached host has registered, or forwards them to all
ports contained within the designated multicast VLAN g roup.
Network Time Protocol (NTP)
NTP provides the mechanisms to synchronize time across the network.
The time servers operate in a hierarchical-master-slave configuration in
order to synchronize local clocks within the subnet and to nation al time
standards via wire or radio.
Out-of-Band Management
Management of the network from a station not attached to the network.
Port Authentication
See IEEE 802.1X.
Port Mirroring
A method whereby data on a target port is mirrored to a monitor port for
troubleshooting with a logic analyzer or RMON probe. T his allows data on
the target port to be studied unobstructively.
Port Trunk
Defines a network link aggregation and trunk ing method which specifies
how to create a single high-speed logical link that combines several
lower-speed physical links.
Plain Old Telephone Service (POTS)
One of the services using voice band. Sometimes used as a descriptor for
all voice band services.