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Past Papers CCNA Quiz Questions Answers
1. Which database or table must be identical on all link-state routers within an area in order to construct an accurate SPF tree?
Neighbor table
Adjacency table
Link-state database (Answer)
Routing table
2. What range of addresses can be used in the first octet of a Class C address?
1-127
203-234
129-192
192-223 (Answer)
3. How many bytes is an Ethernet address?
4
6 (Answer)
3
5
4. What range of addresses can be used in the first octet of a Class B network address?
128-190
1-127
1-126
128-191 (Answer)
129-192
5. If a host broadcasts a frame that includes a source and destination hardware address, and its purpose is to assign IP addresses to itself, which protocol at the Network layer does the host use?
ICMP
ARPA
IPX
RARP (Answer)
6. What is the valid host range the IP address 172.16.10.22 255.255.255.240 is a part of?
172.16.10.20 through 172.16.10.22
172.16.10.17 through 172.16.10.30 (Answer)
172.16.10.1 through 172.16.10.255
172.16.10.16 through 172.16.10.23
172.16.10.17 through 172.16.10.31
7. Which algorithm is run by link-state routing protocols to calculate the shortest path to destination networks?
DUAL
Dijkstra (Answer)
Bellman-Ford
Diffie-Hellman
8. What protocol is used to find the hardware address of a local device?
BootP
ICMP
RARP
IP
ARP (Answer)
9. Which protocol works at the Transport layer and provides virtual circuits between hosts?
UDP
TCP (Answer)
ARP
IP
10. Which routers will router D receive hello packets?
B and C
A and E
C only
A, B, C, and E
11. What feature do modern link-state protocols provide to minimize processing and memory requirements?
Splitting routing topologies into smaller areas (Answer)
Strict split horizon rules to reduce routing table entries
Assigning lower process priorities to route calculations
Using update timers to restrict routing updates
12. What action does a link-state router take immediately upon receipt of an LSP from a neighboring router?
Floods the LSP to neighbors (Answer)
Calculates the SPF algorithm
Computes the best path to the destination network
Runs the Bellman-Ford algorithm
13. What two statements (Answer)ly describe the link state routing process?
Each router in the area floods LSPs to all neighbors
LSPs use the reserved multicast address of 224.0.0.10 to reach neighbors
All routers in the area have link state databases (Answer)
Routing loops are prevented by running the Diffusing Update Algorithm (DUAL)
14. Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
Forward the packet via the route to 10.16.1.0
Forward the packet via the route to 10.16.1.64
Drop the packet
Use the default route (Answer)
15. What is the final step in the link state routing process?
Successors are placed into the routing table
LSPs are flooded to all neighbors to converge the network
DUAL algorithm is run to find best path to destination networks
SPF computes best path to each destination network (Answer)
