S
- shortest path first.
- See [SPF. shortest path first. An algorithm used by IS-IS and OSPF to calculate the shortest path tree to each reachable destination in the network.]
- SIA. stuck-in-active.
A route in EIGRP that has been active for 3 minutes.
- single point of failure.
Any point in a network where losing a single link or device can make some destinations (servers or end devices) unreachable.
- Smooth Round Trip Time.
- See [SRTT. Smooth Round Trip Time. A weighted average of the amount of time it takes for a packet to be acknowledged; used by EIGRP in determining how long to wait for an acknowledgement before taking further action.]
- SONET. Synchronous Optical Network.
A redundant ring network media standardized by the CCITT.
- source routing.
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