A Cisco IOS router is experiencing continuous OSPF adjacency flapping. Further investigation revealed that CPU utilization of OSPF process is very high. The problem is limited to this router. What is the most likely reason for this issue?
A DoS attack targeted at the OSPF process is in progress.
There is a routing loop in the network that involves this router.
A transport problem is causing frequent interface flapping.
A corrupted OSPF packet is received from a neighboring router.
OSPF packets are fragmented due to MTU misconfiguration.
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