S
SAP

Session Announcement Protocol. Used with multicast protocols to handle session conference announcements.

SCB

System Control Board. On an M40 router, the part of the Packet Forwarding Engine that performs route lookups, monitors system components, and controls FPC resets.

SDH

Synchronous Digital Hierarchy. CCITT variation of SONET standard.

SDP

Session Description Protocol. Used with multicast protocols to handle session conference announcements.

SDRAM

Synchronous Dynamic Random Access Memory.

secure shell
See [SSH]
SFM

Switching and Forwarding Module. On an M160 router, a component of the Packet Forwarding Engine that provides route lookup, filtering, and switching to FPCs.

shortest-path-first algorithm
See [SPF]
signaled path

In traffic ...

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