Cisco 200-105 Exam

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

  • 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
Answer: Option A.
Explanation: 

Example 3-1 displays OSPF with a process ID of 1 and places all interfaces configured with an IP address in area 0. The network command network 0.0.0.0
255.255.255.255 area 0 dictates that you do not care what the IP address is, but if an IP address is enabled on any interface, place it in area 0.
Example 3-1 Configuring OSPF in a Single Area router ospf 1 network 0.0.0.0 255.255.255.255 area 0

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