Does traffic go over the internet when two instances communicate using public IP addresses, or when instances communicate with a public AWS service endpoint?
當兩個執行個體使用公有 IP 地址通訊，或當執行個體與公共 AWS 服務端點通訊時，流量是否會通過網際網路？
No. When using public IP addresses, all communication between instances and services hosted in AWS use AWS's private network. Packets that originate from the AWS network with a destination on the AWS network stay on the AWS global network, except traffic to or from AWS China Regions.
In addition, all data flowing across the AWS global network that interconnects our data centers and Regions is automatically encrypted at the physical layer before it leaves our secured facilities. Additional encryption layers exist as well; for example, all VPC cross-region peering traffic, and customer or service-to-service Transport Layer Security (TLS) connections.
否，使用公有 IP 地址時，AWS 中託管的執行個體與服務之間的所有通訊使用 AWS 的私有網路。源自 AWS 網路且目的地在 AWS 網路的封包保留在 AWS 全球網路上，但往返於 AWS 中國區域的流量除外。
此外，連接資料中心和區域的 AWS 全球網路上，所有資料流都會先在實體層自動加密，再傳出我們的安全設施。此外還設有額外的加密層，例如所有 VPC 跨區域對等流量，以及客戶或服務到服務 Transport Layer Security (TLS) 連線。