3Com PS Hub 40, Руководство пользователя

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LOI mode Local Office Interconnect. One of the segment switch’s operating
modes. Refers to the process of forwarding all packets with unknown
addresses to the 100Mbps port (the 100Mbps transceiver module).
main port The port in a resilient link that carries data traffic in normal operating
conditions.
MIB
Management Information Base. Stores a device’s management
characteristics and parameters. MIBs are used by Simple Network
Management Protocol (SNMP) to contain attributes of their managed
systems. The PS Hub contains its own internal MIB.
multicast
Single packets copied to a specific subset of network addresses. These
addresses are specified in the destination-address field of the packet.
permanent address An address in the switch database that has been made permanent.
Permanent addresses are not removed from the switch database by
the ageing process.
protocol A set of rules for communication between devices on a network. The
rules dictate format, timing, sequencing and error control.
resilience Tolerance. For example, the PS Hub’s cascaded cables make a stack of
PS Hubs resilient because you can power off a unit without it affecting
the other units in the stack. You can also build resilience into your
network by having extra equipment and cabling that carries your traffic
if other equipment and cabling fails. See
resilient link .
resilient link
A pair of ports that can be configured so that one will take over data
transmission should the other fail. See also
main port and standby port .
RJ45 Standard 8-wire connector for IEEE 802.3 10BASE-T networks.
RMON
Remote Monitoring. Subset of SNMP MIB II which allows monitoring
and management capabilities by addressing up to ten different groups
of information.
RPS Redundant Power System. Part of the SuperStack II product range,
provides a backup source of power when connected to the PS Hub.