What technology does Alibaba Cloud's Service Mesh primarily use to secure communications?

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The correct choice highlights that Alibaba Cloud's Service Mesh primarily uses service proxies to secure communications between services in a distributed application environment. Service proxies facilitate secure communication by managing the interactions between microservices, which can include handling authentication, encryption, and routing. This allows for enhanced security features that are necessary in a microservices architecture, such as mutual TLS (mTLS) and policy enforcement, ensuring that data transmitted between services remains confidential and secure.

In contrast to other technologies listed, API gateways primarily focus on managing API traffic and enforcing policies at the entry point of services rather than providing direct communication security between the services themselves. Load balancers are used for distributing incoming network traffic across multiple servers to ensure reliability and efficiency but do not inherently provide the security features required for inter-service communication. Similarly, virtual private networks (VPNs) create secure connections over the internet but do not specifically address the needs of microservices interacting within a cloud environment. Thus, service proxies serve as the backbone of communication security in a Service Mesh architecture, making this choice the most relevant.

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