# Related resources for transit gateway policy tables
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For more information, see the following resources:
+ [Transit gateway route tables in AWS Transit Gateway](tgw-route-tables.md)
+ [VPC attachments](tgw-vpc-attachments.md)
+ [AWS Network Firewall with transit gateway](https://docs.aws.amazon.com/network-firewall/latest/developerguide/arch-igw-ngfw.html)
+ [CloudWatch metrics in AWS Transit Gateway](transit-gateway-cloudwatch-metrics.md)