CCNA 3 1-3

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
• DBD
• LSR
• LSU
• LSAck

Which three statements describe features of the OSPF topology table? (Choose three.)

• It is a link-state database that represents the network topology.
• When converged, all routers in an area have identical topology tables.
• The table can be viewed via the show ip ospf database command.
• Its contents are the result of running the SPF algorithm.
• The topology table contains feasible successor routes.

What does an OSPF area contain?

• routers that share the same router ID
• routers that have the same link-state information in their LSDBs
• routers whose SPF trees are identical
• routers that share the same process ID

What is used to facilitate hierarchical routing in OSPF?

• the use of multiple areas
• frequent SPF calculations
• autosummarization
• the election of designated routers

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

A network engineer has manually configured the hello interval to 15 seconds on an interface of a router that is running OSPFv2. By default, how will the dead interval on the interface be affected?

• The dead interval will now be 60 seconds
• The dead interval will now be 30 seconds
• The dead interval will not change from the default value
• The dead interval will now be 15 seconds

Refer to the exhibit. A network administrator has configured the OSPF timers to the values that are shown in the graphic. What is the result of having those manually configured timers?

• R1 automatically adjusts its own timers to match the R2 timers
• The R1 dead timer expires between hello packets from R2
• The hello timer on R2 expires every ten seconds
• The neighbor adjacency has formed

To establish a neighbor adjacency two OSPF routers will exchange hello packets. Which two values in the hello packets must match on both routers? (Choose two.)

• dead interval
• hello interval
• router priority
• list of neighbors
• router ID