Quiz-OSPF

What is a function of OSPF hello packets?

• to send specifically requested link-state records

• to discover neighbors and build adjacencies between them

• to ensure database synchronization between routers

• to request specific link-state records from neighbor routers

Which OSPF packet contains the different types of link-state advertisements?

• hello

• LSR

• LSU

• LSAck

What does an OSPF area contain?

• routers that share the same router ID

• routers whose SPF trees are identical

• routers that have the same link-state information in their LSDBs

• routers that share the same process ID

Which OSPF data structure is identical on all OSPF routers that share the same area?

• forwarding database

• link-state database

• adjacency database

• routing table

Which step does an OSPF-enabled router take immediately after establishing an adjacency with another router?

• builds the topology table

• exchanges link-state advertisements

• chooses the best path

• executes the SPF algorithm

What is the default router priority value for all Cisco OSPF routers?

• 0

• 1

• 10

• 255

Which type of OSPFv2 packet contains an abbreviated list of the LSDB of a sending router and is used by receiving routers to check against the local LSDB?

• database description

• link-state update

• link-state request

• link-state acknowledgment

In an OSPF network when are DR and BDR elections required?

• when the two adjacent neighbors are interconnected over a point-to-point link

• when all the routers in an OSPF area cannot form adjacencies

• when the routers are interconnected over a common Ethernet network

• when the two adjacent neighbors are in two different networks

When an OSPF network is converged and no network topology change has been detected by a router, how often will LSU packets be sent to neighboring routers?

• every 5 minutes

• every 10 minutes

• every 30 minutes

• every 60 minutes

What are the two purposes of an OSPF router ID? (Choose two.)

• to uniquely identify the router within the OSPF domain

• to facilitate the establishment of network convergence

• to facilitate router participation in the election of the designated router

• to facilitate the transition of the OSPF neighbor state to Full