Tencent Cloud Load Balancer (CLB) distributes requests from clients to multiple real servers associated with the CLB in the same region as specified by setting a virtual IP address (VIP).CLB virtualizes multiple servers bound to it to build an available service pool, checks their health, and automatically isolates unhealthy servers from healthy ones, thereby resolving single points of failure issues and improving the overall service capabilities of the applications. CLB strictly isolates the traffic of each tenant and provides active protection against DDoS attacks. Public network CLB supports [Anti-DDoS Basic] (https://www.tencentcloud.com/document/product/297?from_cn_redirect=1) by default.Tencent Cloud CLB is a solution for multiple servers to serve at the same time, and should be used together with real servers.> Note:> * All CLB APIs described here have been upgraded to the latest API 3.0. All new CLB-related features will also be added in this section. It is strongly recommended to use the latest API 3.0.> * The features of old APIs remain available and may be not maintained in the future. If you still need to use old APIs, see CLB APIs (Old Version) Introduction.