SMC Networks SMC2555W-AG - Manual (Page 247)

Glossary
Glossary-5
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 System
A security option which broadcasts a beacon signal including the
access point’s configured SSID. Wireless clients can read the
SSID from the beacon, and automatically reset their SSID to
allow immediate connection to the nearest access point.
Orthogonal Frequency Division Multiplexing (ODFM)
OFDM allows multiple users to transmit in an allocated band by
dividing the bandwidth into many narrow bandwidth carriers.
Power over Ethernet (PoE)
A specification for providing both power and data to low-power
network devices using a single Category 5 Ethernet cable. PoE
provides greater flexibility in the locating of access point’s and
network devices, and significantly decreased installation costs.
RADIUS
A logon authentication protocol that uses software running on a
central server to control access to the network.
Roaming
A wireless LAN mobile user moves around an ESS and maintains
a continuous connection to the infrastructure network.
RTS Threshold
Transmitters contending for the medium may not be aware of
each other. RTS/CTS mechanism can solve this “Hidden Node