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LOSSARY
Glossary-6
order to synchronize local clocks within the subnet and to national 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. This allows data on
the target port to be studied unobstructively.
Port Trunk
Defines a network link aggregation and trunking method which specifies
how to create a single high-speed logical link that combines several
lower-speed physical links.
Private VLANs
Private VLANs provide port-based security and isolation between ports
within the assigned VLAN. Data traffic on downlink ports can only be
forwarded to, and from, uplink ports.
Quality of Service (QoS)
QoS refers to the capability of a network to provide better service to
selected traffic flows using features such as data prioritization, queuing,
congestion avoidance and traffic shaping. These features effectively
provide preferential treatment to specific flows either by raising the
priority of one flow or limiting the priority of another flow.