ICND1: Interconnecting Cisco Networking Devices Part 1 (CCENT, legacy) — Question 9

What OSPF command, when configured, will include all interfaces into area 0?

Answer options

• A. network 0.0.0.0 255.255.255.255 area 0
• B. network 0.0.0.0 0.0.0.0 area 0
• C. network 255.255.255.255 0.0.0.0 area 0
• D. network all-interfaces area 0 A

Correct answer:

Explanation

The correct answer is A, as the command 'network 0.0.0.0 255.255.255.255 area 0' matches all interfaces in the router's OSPF configuration. Option B is incorrect because it uses a wildcard mask of 0.0.0.0, which would not include any interfaces. Option C is also incorrect since it uses a non-standard wildcard mask. Option D is invalid due to the incorrect syntax.