IBM SAN32M1, Installation And Service Manual

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SAN32M1 Fabric Switch Installation and Service Manual 570
segmented E_Port
See segmented expansion port .
segmented expansion
port
Segmented E_Port. E_Port that has ceased to function as an E_Port
within a multiswitch fabric due to an incompatibility between the
fabrics that it joins. See also
bridge port ; fabric port ; generic port ; node
port .
serial port
A full-duplex channel that sends and receives data at the same time.
It consists of three wires: two that move data one bit at a time in
opposite directions, and a third wire that is a common signal ground
wire.
server
A computer that provides shared resources, such as files and printers,
to the network. Used primarily to store data, providing access to
shared resources. Usually contains a network operating system.
SFP transceivers See small form factor pluggable transceivers .
shortwave Lasers or light-emitting diodes (LEDs) that emit light with wave-
lengths 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 mes-
sages. SMTP protocols specify how messages are passed across a link
from one system to another. They do not specify how the mail appli-
cation 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.