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Glossary
Avaya P460 Reference Guide 209
of servers attached to the network. The responses are used to update a table in the
router known as the Server Information Table. SAP is primarily used in Novell
NetWare operating systems in conjunction with IPX.
SAR
Segmentation and Reassembly. One of the two sublayers of the AAL. SAR inserts
data from the information frames into the cell. It adds any necessary header or
trailer bits to the data and passes the 48-octet data packet to the ATM layer. Each
AAL type has its own SAR format.
Segmentation
Segmentation is a common solution to LAN bandwidth limitations. The LAN is
divided into separate LAN segments using bridges and routers. If segmented
correctly, most network traffic will remain within a single segment, enjoying the full
10 Mbps bandwidth. Hubs and switches are used to connect each segment to the
rest of the LAN.
SELector (SEL)
The last byte in an NSAP address.The SELector is often used to identify particular
ATM applications.
Side-Band
Transmission of auxiliary information, such as management messages, by means of
a direct connection that bypasses the frequencies and channels normally used for
information transfer. Unlike out-of-band transmission, side-band transmission does
not require a modem.
SLIP
Serial Line Internet Protocol. SLIP is the standard protocol for point-to-point serial
connections, using a variation of TCP/IP.
SMON
Switch Monitoring, Avaya’s proprietary switch monitoring technology. SMON
extends the RMON standard to provide additional tools and features for monitoring
in the switch environment. SMON enables a global view of traffic for all switches on
the network, an overall view of traffic passing through a specific switch, detailed
data of the hosts transmitting packets or cells through a switch, an analysis of traffic
passing through each port connected to a switch, and a view of traffic between
various hosts connected to a switch.
SMTP
Simple Mail Transfer Protocol. Used to send E-mail messages between servers. Also
used to send messages from a mail client to a mail server.