Glossary

SFP transceivers

See small form factor pluggable transceivers.

shortwave

Lasers or light-emitting diodes (LEDs) that emit light with wavelengths around 780 nm or 850 nm. When using multimode fiber (50 nm) shortwave lasers can be used with Fibre Channel links less than 500 m. To achieve longer lengths, single-mode fiber is required. The preferred fiber core size is 50 micron as this fiber has large bandwidth so that the distance is limited by the fiber attenuation. A 62.5 micron core size is also supported for compatibility with existing FDDI installations. Fiber of this type has smaller bandwidth and, in this case, the distance is limited by the fiber bandwidth.

simple mail transfer protocol

SMTP. A transmission control protocol/Internet protocol (TCP/IP) protocol that allows the user to create, send, and receive text messages. SMTP protocols specify how messages are passed across a link from one system to another. They do not specify how the mail application accepts, presents, or stores the mail.

simple network management protocol

SNMP. A transmission control protocol/Internet protocol (TCP/IP)-derived protocol governing network management and monitoring of network devices.

simple network management protocol community

SNMP community. Also known as SNMP community string. SNMP community is a cluster of managed products (in SNMP terminology, hosts) to which the server or managed product running the SNMP agent belongs.

simple network management protocol community name

SNMP community name. The name assigned to a given SNMP community. Queries from an SNMP management station to a device running an SNMP agent will only elicit a response if those queries are addressed with the correct SNMP community name.

simple network management protocol management station

SNMP management station. An SNMP workstation personal computer (PC) used to oversee the SNMP network.

simple network management protocol version 1

SNMP v1. The original standard for SNMP is now referred to as SNMP v1. The Sphereon 3216 and Sphereon 3232 use SNMP v1.

simple network management protocol version 2

SNMP v2. The second version of the SNMP standard. This version expands the functionality of SNMP and broadens its ability to include OSI-based, as well as TCP/IP-based, networks as specified in RFC 1441 through 1452.