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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.
Protected Extensible
Authentication
Protocol (PEAP)
A protocol proposed by Microsoft, Cisco and RSA Security for securely
transporting authentication data, including passwords, over 802.11
wireless networks. Like the competing standard Tunneled Transport
Layer Security (TTLS), PEAP makes it possible to authenticate wireless
LAN clients without requiring them to have certificates, simplifying the
architecture of secure wireless LANs.Protocol-Independent Multicasting
(PIM)
This multicast routing protocol floods multicast traffic downstream, and
calculates the shortest-path back to the multicast source network via
reverse path forwarding. PIM uses the router’s IP routing table rather
than maintaining a separate multicast routing table as with DVMRP.
PIM - Sparse Mode is designed for networks where the probability of a
multicast client is low, such as on a Wide Area Network. PIM - Dense
Mode is designed for networks where the probability of a multicast
client is high and frequent flooding of multicast traffic can be justified.
Remote
Authentication
Dial-in User Service
(RADIUS)
RADIUS is a logon authentication protocol that uses software running
on a central server to control access to RADIUS-compliant devices on
the network.
Remote Monitoring
(RMON)
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.
Rapid Spanning Tree
Protocol (RSTP)
RSTP reduces the convergence time for network topology changes to
about 10% of that required by the older IEEE 802.1D STP standard.
Secure Shell (SSH) A secure replacement for remote access functions, including Telnet. SSH
can authenticate users with a cryptographic key, and encrypt data
connections between management clients and the switch.