Service manual

Glossary
g-23
Glossary
small form factor
pluggable transceiver
A laser-driven small form factor optical transceiver used for a wide
range of networking applications requiring high data rates (usually 1
and 2 Gbps). SFP transceivers provide port connectivity for
Intrepid-series directors and Sphereon-series switches. Contrast with
gigabit interface converter and SC duplex connector.
SMTP See simple mail transfer protocol.
SNMP See simple network management protocol.
SNMP community The relationship between an SNMP agent and a set of SNMP
managers that define authentication, access control, and proxy
characteristics. An SNMP community is specified by a name that the
agent software recognizes as a valid source for SNMP requests.
storage area network A dedicated, high-performance data communication network that
establishes a direct connection between servers and storage devices.
SANs are typically connected through Fibre Channel directors and
fabric switches, and allows resources to be effectively shared and
consolidated. Contrast with local area network,metropolitanareanetwork,
and wide area network.
subnet mask A subnet mask is used by a computer to determine if another
computer is located on a local or remote network. The subnet mask
dependson theclass ofnetwork to whichthe computer isconnecting.
The mask indicates the digits to search in a longer network address,
and allows a router to avoid handling the entire address. Typically, a
subnet represents all devices configured at one location, building, or
onthesameLAN.
switched fabric One of three topologies offered by the Fibre Channel protocol. The
topology is structured as a network of one or more interconnected
switch elements. Each element connects device N_Ports and is
capable of routing (switching) Fibre Channel frames, using
destination ID information accompanying data frames. See also
point-to-point and switched fabric.
switched mode When an ES-1000 Switch is set toswitchedmode,the switch bypasses
loop arbitration and enables frame transmission through multiple,
logical connected device pairs. All connected device pairs share the
switch bandwidth. Contrast with shared mode.
switch priority Avalueconfiguredforeachswitchinafabricthatdeterminesthe
relative likelihood of the switch becoming the fabric principal switch.