Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) — Question 425

A new site has been added to an OPSF network using area 2. Area 2 is connected only to area 1 of this OSPF network. Area 1 is used to connect area 1 to the backbone area 0. Should you expect full connectivity to the networks located in area 2 from area 0 in this scenario?

Answer options

• A. Yes, by default there will be full connectivity.
• B. No, you will need to redistribute the area 2 routes into area 0.
• C. No, a virtual link is needed to logically connect area 2 info area 0.
• D. Yes, but area 2 will need to be configured as a stub area.

Correct answer: C

Explanation

The correct answer is C because, in OSPF, area 2, being non-backbone and directly connected only to area 1, requires a virtual link to connect to area 0 for full routing information. Option A is incorrect as default behavior does not ensure connectivity between non-backbone areas. Option B is also incorrect because redistribution alone cannot establish a connection to area 0. Option D is wrong because configuring area 2 as a stub area does not suffice for connectivity to area 0.