市面上许多的vps主机，本身是从独立服务器中分割而出的，但是大部分的美国vps是不提供额外的DDOS保护的，只有一般的主机防御，但是也不排除有的美国vps主机提供DDOS防御，那是因为被分割的独立服务器本身也带着DDOS防护。
所以如果有一家VPS 提供商购买了 带有DDOS保护10Gbps的独立服务器，再将这台独立服务器分割出来，那么这些VPS都具有10Gbps防护。
为什么需要DDOS保护呢？
是服务器可能会被DDoS攻击和类似的恶意流量所淹没，甚至可能会崩溃。
如果不受保护，您的托管服务提供商必须采取措施保护基础架构和其他客户免受恶意流量的侵害。他们通常最终会将您的主机和数据包发送到/ dev / null永远不会被再次看到，这会使您的服务脱机。这通常称为无效路由或黑名单。
所以总的来说，在选择美国vps时，也需要注意是否带有DDOS防御。
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