# Overview

Zenlayer Cloud Networking is a private, on-demand, and full-mesh network built on our global backbone spanning 37 countries and regions across 6 continents. Cloud Networking provides instant connectivity to global public clouds, private clouds, data centers, and your offices while reducing latency and data loss for applications and platforms.

<figure><img src="https://3201622183-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9X3FDdkCL2HzhbPpPMFt%2Fuploads%2Fgit-blob-6ba85576fb8cbb225369cb878a9da1e2e48fbe72%2FArticle_1%20(22).jpg?alt=media" alt=""><figcaption><p>Cloud Networking Overview</p></figcaption></figure>

Zenlayer Cloud Networking solution is supported by SDN (software-defined networking), a cutting-edge technology that offers 99.99% carrier-grade network service and a highly scalable and predictable network infrastructure.

Early SDN deployments were based on the OpenFlow protocol. SDN goes beyond OpenFlow, providing a comprehensive framework based on technologies like SR (segment routing), EVPN (ethernet virtual private network), and VxLAN (virtual extensible local area network) — providing superior resilience, flexibility, path selection, and network telemetry for advanced traffic engineering.

SDN also treats the network as a separate domain, reducing operational complexity and costs to improve performance.