CCNA R&S Exam Prep Question of the Week

May 9, 2014 Johnny Bass Cisco, Cloudera, Featured, Professional Development, Project Management, Routing & Switching, Technology, Training in Business

What information does a router running a link state protocol use to build and maintain its topological database? Choose two.

A. LSAs from other routers
B. SAP messages sent by other routers
C. hello packets
D. TTL packets from designated routers
E. Beacons received on point-to-point links
F. Routing tables received from other link state routers

The correct answer is A and C.

First OSPF uses link state advertisements (LSA) to pass routing information from router to router that contribute to the link state database. Once the LSAs are received and acknowledged, the hello packets are used as a keep alive so the router knows to hold on to the information received from the other router.

Related Resources
CCNA Exam Prep Mobile App

CCNA R&S Exam Prep Question of the Week Series

Please support our Sponsors here :