Which two techniques are used in an OSPF network design to slow down the distribution of topology

Question

Options

• ALSA throttling
• BSPF throttling
• CIP event dampening
• DLink-state incremental SPF
• ELink-state partial SPF

Explanation

A (LSA throttling) and C (IP event dampening) are the two correct techniques for slowing down topology distribution in OSPF.

LSA throttling directly controls how frequently Link State Advertisements are generated and flooded across the network - by introducing configurable delays between LSA originations, it prevents rapid topology changes from immediately overwhelming the network with updates. IP event dampening works at the interface level, suppressing flapping interface state changes before they ever trigger OSPF topology updates, effectively acting as a gatekeeper that slows the entry of instability events into the OSPF domain.

B (SPF throttling) is a distractor because it controls how frequently the SPF algorithm runs (computation), not how topology information is distributed - it affects local processing, not flooding behavior. D (Incremental SPF) and E (Partial SPF) are both SPF optimization techniques that improve calculation efficiency by only recomputing affected portions of the tree; they speed up convergence rather than slow down distribution.

Memory tip: Think of the two correct answers as "gate before" and "gate during" - IP event dampening gates events before OSPF sees them (interface layer), while LSA throttling gates how fast OSPF distributes them (flooding layer). SPF-related options all deal with calculation, not communication.

No community discussion yet for this question.