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Which action must be taken to avoid this attack and still be able to advertise this subnet into OSPF?

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(@bulluckrolando)
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Refer to the exhibit.

An attacker can advertise OSPF fake routes from 172.16.20.0 network to the OSPF domain and black hole traffic .

Which action must be taken to avoid this attack and still be able to advertise this subnet into OSPF?

  • A . Configure 172.16.20.0 as a stub network.
  • B . Apply a policy to filter OSPF packets on R2.
  • C . Configure a passive Interface on R2 toward 172.16.20.0.
  • D . Configure graceful restart on the 172.16.20.0 interface.

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Suggested Answer: C

   
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