Exam 200-120 Question id=39 IP Routing Technologies

ospf-default

The network associate is configuring OSPF on the edge router.
All the connections to the branches (B1-B3) and R1 should be participating in OSPF area0.
The link to the ISP should not participate in OSPF and should only be advertised as the default route.

What set of commands will properly configure the edge router?

A. edge(config)# router ospf 1 edge(config-router)# network 10.0.0.0 0.255.255.255 area 0 edge(config-router)# default-information originate edge(config-router)# exit edge(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.14
B. edge(config)# router ospf 1 edge(config-router)# network 10.1.2.12 0.0.0.3 area 0 edge(config-router)# default-information originate edge(config-router)# exit edge(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.14
C. edge(config)# router ospf 1 edge(config-router)# network 10.1.2.16 0.0.0.15 area 0 edge(config-router)# default-information originate edge(config-router)# exit edge(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.14
D. edge(config)# router ospf 1 edge(config-router)# network 10.1.2.0 0.0.0.255 area 0 edge(config-router)# default-information originate edge(config-router)# exit edge(config)# ip route 0.0.0.0 0.0.0.0 10.1.2.14
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The interface to ISP should not participate in OSPF, so network ospf command should not include 10.1.2.12/30 and must include all other interfaces. Correct command is:
network 10.1.2.16 0.0.0.15 area 0



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