She diagnosed Liver Qi stagnation and sent Harvey to a Shen balancer.

安妮特：她诊断出肝气停滞，把哈维送到了沈平衡器。

This determines how the load balancer distributes incoming requests to the backend servers.

这决定了负载均衡器如何将传入请求发到后端服务器。

Second is the layer in the OSI model that the load balancer operates at.

第二个是负载均衡器 OSI 中运行层。

So load balancers can operate at different layers.

因此, 负载均衡器可以不同层上运行。

All right, but what are our load balancers distributing traffic to?

好吧, 但是我们负载均衡器将配给什么?

Now, when we talk about load balancers, there are two relevant points of discussion that are worth bringing up in your interview.

现，当我们谈论负载均衡器时，有两个相关讨论点值得面试中提出。

Our load balancer will then take that request and send it to our API gateway.

然后，我们负载均衡器将接收该请求并将其发送到我们 API 网关。

From here, requests sent from the client hit our load balancer.

从这里开始, 客户端发送请求会触及我们负载均衡器。

Load balancers distribute incoming traffic across multiple servers, and they're key to scalability in just about every single system design interview that you're going to do.

负载均衡器多个服务器之间配传入，您将要进行几乎每个系统设计面试中，它们都是可扩展性关键。

Now, the API gateway's responsibility is to take the incoming requests from the load balancer and forward them on to the appropriate service.

现，API Gateway 职责是接收来自负载均衡器传入请求，并将其转发到相应服务。

And then our load balancer is going to be a layer 7 load balancer.

然后, 我们负载均衡器将是一个第 7 层负载均衡器。

Layer 7 load balancers are interesting because they can make routing decisions based on the actual content of the request, such as the URL or the header.

第 7 层负载均衡器很有趣，因为它们可以根据请求实际内容（例如 URL 或标头）做出路由决策。

It's worth mentioning that these three components, the client, the load balancer, and the API gateway, are going to be present in roughly 90% of the system design interviews that you do.

值得一提是，这三个组件（客户端、负载均衡器和 API 网关）将出现您所做大约 90% 系统设计面试中。