Free Cisco CCNA Questions

In which database can you see all of the routers discovered in the OSPF network in which hello packets were sent and acknowledged? A. The routing table database B. The neighborship database C. The topological database D. The link state database B. The neighborship database is where all of the routers can be found that have responded to hello packets. The neighborship database contains all of the routers by RID, and each router participating in OSPF manages its own neighborship database.

How is a designated router elected for OSPF? A. The DR is elected by the highest priority and highest RID in the same autonomous system. B. The DR is elected by the lowest priority and highest RID in the same area. C. The DR is elected by the lowest priority and lowest RID. D. The DR is elected by the highest priority and highest RID in the same broadcast network. D. The designated router is elected by the highest priority in the LAN. If the priorities are all the same, then the highest RID becomes the tiebreaker. OSPF will elect a DR for each broadcast network, such as a LAN. This is to minimize the number of adjacencies formed.

Which statement is correct about adjacency with OSPF on a broadcast network (LAN)? A. An adjacency is formed between routers on the same link. B. An adjacency is formed between the DR and every neighbor router on the same LAN. C. An adjacency is formed between the DR and every router in the same autonomous system. D. An adjacency is formed between the DR and every router in the same OSPF area. B. Adjacencies are formed between the designated router (DR) and its neighbors on the same LAN. This is done to ensure that all neighbor routers have the same Link State Database (LSDB).

What is the definition of an OSPF link? A. Two routers participating in OSPF routing B. Two routers that share the same area ID C. A routed interface added to the OSPF process D. Two routers that share the same AS number C. A link is a routed interface that is assigned to a network and participates in the OSPF process. This link will be tracked by the OSPF process for up/down information as well as the network it is associated with.

How do Cisco routers determine their router ID (RID)? A. The lowest IP address configured on the loopback interfaces B. The highest IP address configured on the router C. The lowest IP address configured on the router D. The highest MAC address configured on the router B. The highest IP address configured on all of the loopback interfaces is chosen first. If a loopback is not configured, then the highest IP address on an active interface is chosen. However, if a RID is statically set via the OSPF process, it will override all of the above.

Which statement is true about OSPF? A. OSPF is a distance-vector protocol. B. OSPF performs default auto-summarization. C. OSPF broadcasts changes to the routing tables. D. OSPF updates are event triggered. D. OSPF updates are event triggered. These events could be a neighbor router not responding or a route going down.

When you check the IPv6 addresses configured on the interfaces, you find two IPv6 addresses: One address is a 2001:db8::/64 address. The other is an ff80::/64 address. However, you do not see a route statement for the ff80::/64 address in the routing table. Why? A. Multicast addresses do not get added to the routing tables. B. Link-local addresses do not get added to the routing tables. C. Only one route statement can be in the routing table at a time for aninterface. D. Broadcast addresses do not get added to the routing tables. B. The second address on an interface with the prefix of ff80::/64 is the link-local address for Duplicate Address Detection (DAD) and Stateless Address Autoconfiguration (SLAAC). Link-local addresses are non-routable, so they will not get added to the routing table.