B is correct
-The maximum bandwidth per "VPC attachment", AWS Direct Connect gateway, or peered transit gateway connection Up to 50 Gbps
https://docs.aws.amazon.com/vpc/latest/tgw/transit-gateway-quotas.html
B is correct,
with Transit Gateway, Maximum bandwidth (burst) per Availability Zone per
VPC connection is 50 Gbps. VPC peering has no aggregate bandwidth. Individual instance network
performance limits and flow limits (10 Gbps within a placement group and 5 Gbps otherwise) apply to
both options. Only VPC peering supports placement groups.
Reference: https://d1.awsstatic.com/whitepapers/building-a-scalable-and-secure-multi-vpc-aws-network-infrastructure.pdf
Hi, the question is related to bandwidth per attachment not VPN tunnel.
-The maximum bandwidth per VPN tunnel is Up to 1.25 Gbps
-The maximum bandwidth per "VPC attachment", AWS Direct Connect gateway, or peered transit gateway connection Up to 50 Gbps
B is correct
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