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What is true about this configuration?

Refer to the exhibit.

C-router is to be used as a “router-on-a-stick” to route between the VLANs. All the interfaces have
been properly configured and IP routing is operational. The hosts in the VLANs have been
configured with the appropriate default gateway. What is true about this configuration?

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A.
These commands need to be added to the configuration:
C-router(config)# router eigrp 123
C-router(config-router)# network 172.19.0.0

B.
These commands need to be added to the configuration:
C-router(config)# router ospf 1
C-router(config-router)# network 172.19.0.0 0.0.3.255 area 0

C.
These commands need to be added to the configuration:
C-router(config)# router rip
C-router(config-router)# network 172.19.0.0

D.
No further routing configuration is required.

Explanation:
Since all the same router (C-router) is the default gateway for all three VLANs, all traffic destined
to a different VLA will be sent to the C-router. The C-router will have knowledge of all three
networks since they will appear as directly connected in the routing table. Since the C-router
already knows how to get to all three networks, no routing protocols need to be configured.


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