Exam 300-101 topic 2 question 491 discussion

Actual exam question from Cisco's 300-101

Question #: 491
Topic #: 2

RouterA#
~~~~~
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 1
network 172.16.1.0 0.0.0.255 area 1
!
~~~~~
RouterB#
~~~~~
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 2
network 172.16.2.0 0.0.0.255 area 2
!
~~~~~
RouterC#
~~~~~
!
router ospf 1
log-adjacency-changes
network 10.0.0.0 0.255.255.255 area 0
!
~~~~~
Refer to the exhibits. You are verifying your OSPF implementation, and it does not seem to be functioning properly. What can you conclude from the exhibit and the show running- configuration command output?

A. The OSPF areas are not configured correctly.
B. The wildcard masks for the 10.x.x.x networks are incorrect.
C. The 172.16.x.x networks need to be connected to area 0 using virtual links.
D. The 172.16.x.x networks are discontiguous. OSPF is automatically summarizing them to 172.16.0.0/16 and data is being "black holed."

Show Suggested Answer

Suggested Answer: E. There is not enough information to make a determination. 🗳️
Explanation -
The E0/0 & E0/1 interfaces of router C belong to area 0 while E0/0 of router A belongs to area 1; E0/0 of router B belongs to area 2 -> it is not correct. Both E0/0 interfaces of router A & B should be in area 0 -> A is not correct.

by Nemanja at Feb. 13, 2020, 7:12 p.m.

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Nemanja

5 years, 3 months ago

A. The OSPF areas are not configured correctly.

upvoted 2 times

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