https://blog.vcf9.ai/https://blog.vcf9.ai/posts/vpc-in-vcf-9-1/https://blog.vcf9.ai/posts/network-model-changes-firewall-rule-count/https://blog.vcf9.ai/posts/layer-2-same-vlan-flows/https://blog.vcf9.ai/posts/most-vcf-flows-never-need-a-firewall-rule/