CCNA Module 1 & 2

What is the 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 neighbors routers

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

• LSAck

• LSR

• DBD

• LSU

• hello

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

• LSAck, Hello, DBD, LSU, LSR

• Hello, DBD, LSR, LSU, LSAck

• Hello, LSAck, LSU, LSR, DBD

• LSU, LSAck, Hello, DBD, LSR

What is used to create the OSPF neighbor table?

• link-state database

• adjacency database

• forwarding database

• routing table

What is identical on all OSPF routers within a single areas.

• neighbor table

• routing table

• link-state database

• static routes

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

• Full

• Two-Way

• ExStart

• Exchange

Which statement is correct about multiarea OSPF?

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

• OSPF multiarea increases the frequency of SPF calculation.

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

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

What is a feature of the OSPF routing protocol?

• OSPF authentication is configured in the same way on IPv4 and IPv6 networks.

• Routers can be grouped into autonomous systems to support a hierarchical system

• It scales well in both small and large networks.

• The SPF algorithm chooses the best path based on 30-second updates.

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 router-id rid command

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

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