Scenario:
You have been asked to evaluate an OSPF network setup in a test lab and to answer questions a customer has about its operation. The customer has disabled your access to the show running-config command.
 
 
Areas of Router 5 and 6 are not normal areas, inspect their routing tables and determine which statement is true?

A. R5's Loopback and R6's Loopback are both present in R5's Routing table

B. R5's Loopback and R6's Loopback are both present in R6's Routing table

C. Only R5's loopback is present in R5's Routing table

D. Only R6's loopback is present in R5's Routing table

E. Only R5's loopback is present in R6's Routing table






 

Suggested Answer: A

Explanation -
Area 2 (of R5) is a Not-so-Stubby area (NSSA). You can check it by the "show ip ospf" command on R4 or R5 (in Area 2 section). For example, below is the output of "show ip ospf" command on R5:
 <img src="https://www.examtopics.com/assets/media/exam-media/02670/n27370100002.jpg" alt="Reference Image" />
In general, NSSA is same as normal area except that it can generate LSA Type 7 (redistribute from another domain) so we can see both Loopback interfaces of
R5 & R6 in the routing table of R5.
 <img src="https://www.examtopics.com/assets/media/exam-media/02670/n27370100003.png" alt="Reference Image" />
Conclusion:
Even that this exercise looks complicated , it can be solve with simple commands:
Q1:show ip ospf database -
Q2show ip ospf database int s0/1
Q3:Show ip ospf -
Q4:show ip ospf and show ip route

This question is in 300-101 Cisco Implementing Cisco IP Routing (ROUTE) Exam
For getting Cisco Certified Network Professional (CCNP) Routing and Switching Certificate




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