Cisco Level 3 Modules 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 request specific link-state records from neighbor routers

• To ensure database synchronization between routers

What is the order of packet types used by an OSPF router to establish convergence?

• LSack, Hello, DBD, LSU, LSR

• Hello, LSack, LSU, LSR, DBD

• LSU, LSack, Hello, DBD, LSR

• Hello, DBD, LSR, LSU, LSack

What function is performed by the OSPF designated router?

• Maintaining the link-state database

• Dissemination of LSAs

• Summarizing routes between areas

• Redistribution of external routers into OSPF

Which statement is correct about multiarea OSPF?

• Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers

• OSPF can consolidate a fragmented OSPF area into one large area

• OSPF multiarea increases the frequency of SPF calculation

• All routers are in one area called the backbone area (area 0)

What is identical on all OSPF routers within a single area?

• Static routes

• Neighbor table

• Routing table

• Link-state database

At which OSPF state are neighbor routers converged and able to exchange routing updates?

• Two-way

• ExStart

• Full

• Exchange

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?

• 255.255.255.254

• 255.255.255.223

• 0.0.0.31

• 0.0.0.32

Which criterion is preferred by the router to choose a router ID?

• The IP address of the highest configured loopback interface on the router

• The IP address of the highest active interface on the router

• The IP address of the highest active OSPF-enabled interface

• The router-id rid command

What does the SPF algorithm consider to be the best path to a network?

• The path with the least number of hops

• The path with the smallest delays

• The path that includes the fastest cumulative bandwidth links

• The path that includes the fastest single bandwidth link

Which command could be used on a router to ensure that an OSPF adjacency is formed with another router?

• Show ip route

• Show ip ospf interface

• Show ip ospf neighbor

• Show ip protocols