Exam 300-420 topic 1 question 14 discussion

I disagree with Benzzyy. I think response D is correct : Query storms are eliminated, which saves bandwidth and CPU and allows the network to converge more quickly. https://www.cisco.com/en/US/technologies/tk648/tk365/technologies_white_paper0900aecd8023df6f.html

Answer is D Reference : ENSLD 300-420 Cert Guide - Chapter 3 "Routing Protocol Characteristics, EIGRP, and IS-IS" - EIGRP Stub

I am thinking as here is asked for convergence time specifically that its answer A. Think about it, if we configure the spokes as stubs we might reduce the queries, take load off of the router and also increase stability but the convergence time would still be minimum 15 seconds (3xhello, 5sec default). So as resources and stability seems to be no problem here, I would go with reducing the timers.

correct, quarries are not forwarded to stubs

D is correct

D Is correct...

A. Enable subsecond timers => cool idea hold on to it and give it a value of 1 second for example B. Increase the hold time value ==> the longer you hold the later you notice a downtime, bad idea C. Increase the dead timer value ==> same as with B) D. Enable stub routing on the spoke ==> not bad idea. Now assume you dont tweak anything, but the mere fact that STUBS are oneway advertisement roads saves on messages going back and forth no matter in what interval. so imho i strongly believe D fits convergence time minimization purposes 100% while A) fits for some architectures and others not really so 99.9999% correct answer Answer: D

Answer is B. Hold-Timer is the amount of time that passes till a route is deemed dead. If you increase the hold time, your delaying the amount of time it takes for that router to send out EIGRP queries to neighboring routers and determine if a new successor exists.