Answer: D. Split horizon rules prevent a router from readvertising routing information back out the same interface it was learned from; poisoned reverse alters this behavior to permit such updates as long as they have an infinite metric.
Answer: C. You specify RIP-enabled interfaces by name and unit number, under the
[edit protocols rip group<name>neighbor]hierarchy.Answer: C. The
show route advertising protocol<protocol><neighbor>command is used to display the route the local router is sending out an interface to a neighbor for RIP/BGP, respectively. Thereceiving-protocolform of this command shows the routes being learned over an interface.Answer: D. Only designated routers, which are elected only on multiaccess networks, generate Type 2 network summary LSAs. This LSA type is used to report the list of OSPF neighbors (including the DR itself) attached to the multiaccess segment.
Answer: C. A stub area with no-summaries does not receive summary LSAs from the backbone. They rely on an injected default route to reach interarea and AS external destinations.
Answer: D. All of the factors listed influence whether a given router can become the DR. Recall that DR election is not revertive. A routerâs ID and priority come into play only during an active DR election.
Answer: D. The protocol with the numerically lowest preference (or administrative distance) is considered more âreliableâ and is chosen as the source of the active route.
Answer: C. Your goal is to filter from area 1 into area 0, so the
area-rangestatement needs to be applied to area 1. The restrict keyword should not be used here as it will also filter on the summary, in effect converting from a match type of longer to one of orlonger. The goal is to permit the summary which makes answer A false.Answer: B. To avoid disruption, the legacy protocol must operate until all aspects of the new IGP have been put in place and confirmed. The new IGP has to be less preferred than the original until you are ready to actually make the switchover.
Answer: B. You must diligently use filtering mechanisms to ensure that routes are never redistributed back into the IGP from where they originated, or else loops will likely form.
Answer: D. For OSPF, JUNOS software supports simple passwords, MD5, and a key chain of MD5 secrets. RIP does not support key chain authentication as of the JUNOS software 8.3 release.
Answer: A. JUNOS software will generate a default route only when a metric value is specified using the
default-metriccommand.
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