User manual

Fast Ethernet: 100Mbps technology based on the Ethernet/CMSA/CD network access method.
Flow Control: (IEEE 802.3z) A means of holding packets back at the transmit port of the connected end
station. Prevents packet loss at a congested switch port.
Forwarding: The process of sending a packet toward its destination by an internetworking device.
Full duplex: A system that allows packets to be transmitted and received at the same time and, in effect,
doubles the potential throughput of a link.
Half duplex: A system that allows packets to be transmitted and received, but not at the same time.
Contrast with full duplex.
IP address: Internet Protocol address. A unique identifier for a device attached to a network using
TCP/IP. The address is written as four octets separated with full-stops (periods), and is made
up of a network section, an optional subnet section and a host section.
IPX: Internetwork Packet Exchange. A protocol allowing communication in a NetWare network.
LAN: Local Area Network:
A network of connected computing resources (such as PCs, printers,
servers) covering a relatively small geographic area (usually not larger than a floor or
building). Characterized by high data rates and low error rates.
Latency: The delay between the time a device receives a packet and the time the packet is forwarded
out of the destination port.
Line speed: See baud rate.
Main port: The port in a resilient link that carries data traffic in normal operating conditions.
MDI: Medium Dependent Interface:
An Ethernet port connection where the transmitter of one
device is connected to the receiver of another device.
MDI-X: Medium Dependent Interface Cross-over:
An Ethernet port connection where the internal
transmit and receive lines are crossed.
MIB: Management Information Base:
Stores a device's management characteristics and parame-
ters. MIBs are used by the Simple Network Management Protocol (SNMP) to contain attributes
of their managed systems. The Switch 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.
Protocol: A set of rules for communication between devices on a network. The rules dictate format,
timing, sequencing and error control.
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.
RJ-45: Standard 8-wire connectors for IEEE 802.3 10BASE-T networks.
RMON: Remote Monitoring. A subset of SNMP MIB II that allows monitoring and management
capabilities by addressing up to ten different groups of information.
RPS: Redundant Power System:
A device that provides a backup source of power when connected
to the Switch.