# 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="/files/mwTwNUpmU1x6i6QgMFRE" 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.


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