# 概览

Zenlayer 云网络是基于我们覆盖六大洲 37 个国家和地区的全球骨干网构建的私有、按需和全网状网络。云网络为全球公共云、二层网络、数据中心和您的办公室提供即时连接，同时降低应用程序和平台的延迟和数据丢失。

<figure><img src="/files/8SBQ0uOGHChJbeU8v5LL" alt=""><figcaption><p>云网络概述</p></figcaption></figure>

Zenlayer 云网络解决方案由 SDN（软件定义网络）支持，这项尖端技术提供 99.99% 的运营商级网络服务和高度可扩展且可预测的网络基础设施。

早期的 SDN 部署基于 OpenFlow 协议。SDN 超越了 OpenFlow，提供了基于 SR（段路由）、EVPN（以太网虚拟私有网络）和 VxLAN（虚拟可扩展局域网）等技术的全面框架——为高级流量工程提供卓越的弹性、灵活性、路径选择和网络遥测。

SDN 还将网络视为一个独立域，降低运营复杂性和成本以提高性能。


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