Refer to the exhibit. How does the router treat the authentication of OSPF packets that enter and leave FastEthernet interface 0/0?
- OSPF packets are sent with authentication key 10 only.
- OSPF packets are sent with authentication key 20 only.
- Two copies of every OSPF packet are sent, one with key 10 and one with key 20.
- Key 10 is used to authenticate incoming packets and key 20 is used to authenticate outgoing packets.
Exam with this question: CCNP ROUTE (Version 6.0) Chapter 3 Exam
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