3Com 3C17300-US Implementation Manual page 115

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Policy Comprises a set of "rules" that are applied to a network so that a
network meets the needs of the business. That is, traffic can be prioritised
across a network according to its importance to that particular business
type.
POST Power On Self Test. An internal test that a Switch carries out when it is
powered-up.
QoS Profile Consists of multiple sets of rules (classifier plus service level
combinations). The QoS profile is assigned to a port(s).
protocol A set of rules for communication between devices on a network. The
rules dictate format, timing, sequencing and error control.
Rada Radius Authenticated Device Access. This feature uses a device MAC
address for authentication against a RADIUS server.
RADIUS Remote Authentication Dial-In User Service. An industry standard
protocol for carrying authentication, authorization and configuration
information between a network device and a shared authentication
server.
Rapid Spanning Tree An enhanced version of the Spanning Tree Protocol that allows faster
Protocol determination of Spanning Tree topology throughout the bridged
network.
repeater A simple device that regenerates LAN traffic so that the transmission
distance of that signal can be extended. Repeaters are used to connect
two LANs of the same network type.
resilient link A pair of ports that can be configured so that one takes over data
transmission should the other fail. See also main port and standby port.
RMON IETF Remote Monitoring MIB. A MIB that allows you to remotely
monitor LANs by addressing up to nine different groups of information.
router A router is a device on your network which is used to forward IP
packets to a remote destination. An alternative name for a router is a
gateway.
RPS Redundant Power System. A device that provides a backup source of
power when connected to a Switch.
RSTP See Rapid Spanning Tree Protocol.