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You have configured an IPSec VPN tunnel over your FastConnect circuit to OCI. You are experiencing intermittent connectivity issues and notice that the VPN tunnel is flapping (frequently going up and down). You have verified the IKE and IPSec configuration and confirmed that the security policies are correct. Which is a LESS likely cause of the VPN tunnel flapping when using IPSec over FastConnect, compared to using IPSec over the public internet?
Correct Answer: A
* Context: Tunnel flapping over FastConnect vs. public internet. * Option A: Congestion/packet loss is less likely over FastConnect's dedicated link than the unpredictable public internet-correct. * Option B: Mismatched keys/parameters would prevent tunnel establishment, not flapping-equally likely in both. * Option C: MTU issues cause fragmentation in both scenarios-equally likely. * Option D: BGP flapping is more relevant with FastConnect's dynamic routing-more likely here. * Conclusion: Option A is less likely over FastConnect. Oracle notes: * "FastConnect provides a stable, dedicated connection, reducing congestion and packet loss compared to public internet VPNs."This supports Option A. Reference:IPSec over FastConnect - Oracle Help Center (docs.oracle.com/en-us/iaas/Content/Network/Tasks/settingupIPSec.htm#fastconnect).