In which two ways is a network design improved by including IP Event Dampening? (Choose two)

Question

Options

• AProvides sub-second convergence
• BQuickly detects network failures
• CPrevent routing loops
• DImproves network stability
• EReduces processing load

Explanation

D (Improves network stability) and E (Reduces processing load) are correct. IP Event Dampening suppresses flapping interfaces or routes by assigning escalating penalties each time they go up/down - once the penalty exceeds a threshold, the route is suppressed until it stabilizes. This directly improves stability by preventing unstable routes from continuously advertising changes, and it reduces processing load because routers no longer waste CPU cycles computing and flooding repeated route updates for a flapping path.

Why the others are wrong:

• A (Sub-second convergence): Dampening intentionally delays convergence by suppressing unstable routes - the opposite of fast convergence.
• B (Quickly detects failures): Detection speed is handled by mechanisms like BFD or hello timers; dampening has nothing to do with detection speed.
• C (Prevents routing loops): Loop prevention belongs to protocol mechanics (e.g., split horizon, OSPF's SPF, STP) - not dampening.

Memory tip: Think of dampening like a "penalty box" in hockey - a flapping route gets sent to the box (suppressed), which calms the game (stability) and reduces the referee's workload (processing). It's about taming chaos, not speeding things up.

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