> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/api-reference/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/api-reference/zlb/load-balancer-backend.md).

# Backend Server

<table><thead><tr><th data-type="content-ref">Operation</th><th>Description</th></tr></thead><tbody><tr><td><a href="/api-reference/zlb/load-balancer-backend/describebackends.md">DescribeBackends</a></td><td>Queries the list of backend servers</td></tr><tr><td><a href="/api-reference/zlb/load-balancer-backend/registerbackend.md">RegisterBackend</a></td><td>Binds backend servers to a listener</td></tr><tr><td><a href="/api-reference/zlb/load-balancer-backend/modifybackend.md">ModifyBackend</a></td><td>Modifies the configurations of one or more backend servers</td></tr><tr><td><a href="/api-reference/zlb/load-balancer-backend/deregisterbackend.md">DeregisterBackend</a></td><td>Removes one or more backend servers from a load balance listener</td></tr><tr><td><a href="/api-reference/zlb/load-balancer-backend/describebackendhealth.md">DescribeBackendHealth</a></td><td>Queries the health status of backend servers</td></tr></tbody></table>