You Scored:
Ranking:
Past Papers CCNA Quiz Questions Answers
1. What are two advantages of using a link-state routing protocol instead of a distance vector routing protocol?
The topology database eliminates the need for a routing table.
After the inital LSP flooding, they generally require less bandwidth to communicate changes in a
topology (Answer)
Link-state protocols require less router processor power than distance vector protocols
Each router independently determines the route to each network.
2. Which protocol works at the Internet layer and provides a connection service between hosts?
ARP
IP (Answer)
TCP
UDP
3. Refer to the exhibit. What does JAX do with link-state packets from ORL?
Only adds it to the local routing table and performs no other actions
Sends out the individual link-state packets out the interface connected to BOS (Answer)
Sends out its updated routing table to both ORL and BOS routers
Queries BOS to see if it has a better route
4. When are link-state packets sent to neighbors?
When a link goes up or down (Answer)
Every 180 seconds
After the hold down time expires
Every 30 seconds
5. What two events will cause a link state router to send LSPs to all neighbors?
Immediately after the DUAL FSM has built the topology database
30 second timer expires
Immediately after the Bellman-Ford algorithm has run
Whenever the network topology changes
Upon initial startup of router or routing protocol (Answer)
6. Refer to the exhibit. What kind of information would be seen in an LSP sent from router JAX to router ATL?
A list of all the routing protocols in use
Cost of the link (Answer)
Uptime of the route
Hop count
7. Which protocol working at the Transport layer provides a connectionless service between hosts?
IP
ARP
TCP
UDP (Answer)
8. Why is it difficult for routing loops to occur in networks that use link-state routing?
Routers use hold-down timers to prevent routing loops
Each router builds a simple view of the network based on hop count
Routers flood the network with LSAs to discover routing loops
Each router builds a complete and synchronized view of the network (Answer)
9. If a router interface is congested, which protocol in the IP suite is used to tell neighbor routers?
ARP
ICMP
RARP
IP (Answer)
TCP
10. What speeds up convergence in a network using link-state routing?
Updates that include complete routing tables
Updates sent at regular intervals
Updates sent only to directly connected neighbors
Updates triggered by network changes (Answer)
