AMX NXA-ENET24 Instruction Manual page 412

Glossary
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 national time standards via wire or radio.
Open Shortest Path First (OSPF)
OSPF is a link-state routing protocol that functions better over a larger network such as the Internet,
as opposed to distance-vector routing protocols such as RIP. It includes features such as unlimited
hop count, authentication of routing updates, and Variable Length Subnet Masks (VLSM).
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.
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)
reduces the convergence time for network topology changes to about 10% of that required by
RSTP
the older IEEE 802.1D STP standard.
396 NXA-ENET Software Management Guide