Multiple choice

A route to a destination network is learned from multiple routing protocols. What is used by a Cisco router to select the preferred route to the destination that will be installed in the routing table?

  1. metric

  2. route prefix

  3. update timer

  4. administrative distance
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Administrative distance is the criterion used by Cisco routers to select between routes learned from different routing protocols or sources. Each routing source has a default AD value (e.g., connected=0, static=1, EIGRP=90, OSPF=110, RIP=120). The route with the lowest AD is installed in the routing table, regardless of the routing protocol's metric.

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