642-902 Q&A – Implement an EIGRP based solution (56-60)

Section1 – Implement an EIGRP based solution, given a network design and a set of requirements

QUESTION NO: 56
Which of the following settings do not prevent two potential OSPF neighbors from becoming neighbors?
A. The interface used to connect to that neighbor being passive in the OSPF process
B. Duplicate OSPF router IDs
C. Mismatched dead timers
D. IP addresses of 10.1.1.1/24 and 10.2.2.2/24
E. Mismatched OSPF process IDs

Answer: E
Explanation:
For OSPF, Router IDs must be unique; the interfaces must not be passive; the dead timers must match; and the primary IP addresses must be in the same subnet, with the same subnet mask.
However, the process IDs, found on the router ospf process-id command, do not have to match.

QUESTION NO: 57
When an EIGRP topology change is detected, what is the correct order of events when there is a FS?
A. The neighbor adjacency is deleted.
The feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
B. DUAL is notified.
Remove all topology entries learned from that neighbor.
The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
C. The neighbor adjacency is deleted.
Routes enter the Active state and the feasible route is used.
DUAL is notified.
Remove all topology entries learned from that neighbor.
D. DUAL is notified.
The neighbor adjacency is deleted.
Remove all topology entries learned from that neighbor.
The feasible route is used.
Answer: D

QUESTION NO: 58
Refer to the exhibit. Which statement about dynamic routing protocols for this network is true? Select the best response.

image
A. No dynamic interior routing protocol can summarize as shown.
B. Unless configured otherwise, EIGRP would automatically summarize the prefixes as shown in the exhibit.
C. With this IP addressing scheme, EIGRP can be manually configured to summarize prefixes at the specified summarization points.
D. The IP address design lends itself to OSPF. Each summarizing router would be an ABR, summarizing to the next area in the address hierarchy.
Answer: C

QUESTION NO: 59
Which of the following are methods EIGRP uses to initially populate (seed) its EIGRP topology table, before learning topology data from neighbors? (Choose two.)
A. By adding all subnets listed by the show ip route connected command
B. By adding the subnets of working interfaces over which static neighbors have been defined
C. By adding subnets redistributed on the local router from another routing source
D. By adding all subnets listed by the show ip route static command
Answer: B,C
Explanation:
Other than the two listed correct answers, the local router also adds connected routes for which the network command matches the corresponding interfaces, so it may not add all connected routes. Also, EIGRP does not add static routes to the EIGRP topology table, unless those routes are redistributed.

QUESTION NO: 60
During a redistribution of routes from OSPF into EIGRP, an administrator notices that none of the OSPF routes are showing in EIGRP. What are two possible causes? (Choose two.)
A. incorrect distribute lists have been configured
B. missing ip classless command
C. CEF not enabled
D. no default metric configured for EIGRP
Answer: A,D

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