Digisol DG-FS4526E, Management Manual

Page: 1142 / 1162

G
LOSSARY
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P
ORT
A
UTHENTICATION
See IEEE 802.1X .
P
ORT
M
IRRORING
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.
P
ORT
T
RUNK
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.
P
RIVATE
VLAN
S
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.
Q
IN
Q QinQ tunneling is designed for service providers carrying traffic for multiple
customers across their networks. It is used to maintain customer-specific
VLAN and Layer 2 protocol configurations even when different customers
use the same internal VLAN IDs.
Q
O
S Quality of Service. 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.
RADIUS Remote Authentication Dial-in User Service. RA
DIUS
is a logon
authentication protocol that uses software running on a central server to
control access to RADIUS-compliant devices on the network.
RMON Remote Monitoring. RMON provides comprehensive network monitoring
capabilities. It eliminates the polling required in standard SNMP, and can
set alarms on a variety of traffic conditions, including specific error types.
RSTP Rapid Spanning Tree Protocol. RSTP reduces the convergence time for
network topology changes to about 10% of that required by the older IEEE
802.1D STP standard.
SMTP Simple Mail Transfer Protocol is a standard host-to-host mail transport
protocol that operates over TCP, port 25.
SNMP Simple Network Management Protocol. The application protocol in the
Internet suite of protocols which offers network management services.