CCNP Exam Prep Question of the Week By Guest Authors October 25, 2012 Which routing protocol has the lowest administrative distance? OSPF External EIGRP RIP Internal EIGRP The correct answer is 4. Internal EIGRP is at 90, OSPF is at 110, RIP is at 120, and external EIGRP is at 170. Resources CCNP Certification Prep Kit CCNP eCamp In this article CCNPCertificationCiscoRouting & SwitchingTechnology Join the Conversation Cancel Reply Will not be published. Website Notify me of follow-up comments by email. Notify me of new posts by email.