很多选购美国服务器的站长在选购独服的时候，往往会先看其防御，因为独服的防御决定着后续使用时承受攻击的能力，安全性极为重要，那么如何选购合适的防御呢？
首先要看是否可以免费测试，是否支持日付、周付
因为没有用过，大家不清楚实际的使用效果，所以总会有担心，所以我们都会选择提供测试或者日付的商家，免费测试或者付费测试，测试OK后才会放心购买月付年付这样。
然后了解清楚他的配置和带宽
对配置核带宽有需求的客户，一定要弄清楚美国服务器的商家提供的具体详情。
看看是否能自主管理
美国服务器的商家若是没有24小时售后在线，出现问题就会手忙脚乱，所以自主管理很重要，一旦有需求，自己可以重启美国服务器，或者重做系统等。
了解可以安装什么操作系统
因为客户的某些需求，必须使用指定的操作系统，所以一定要弄清楚你所需要的系统，商家是否有提供。
主机商是否有官方网站
一个可靠的美国高防御服务器商，拥有自己的官网是必须的，能实现自己注册充值购买开通。方便快捷，稳定可靠！
美国服务器的防御价格和优惠力度
由于IDC商越来越多，优惠的力度也是有所不同，价廉物美总是我们所有人都期望的，但是从优惠中也可以看出一个商家服务器及防御真正的性价比。
RAKsmart商家是小编极力推荐的，果然对于美国服务器的防御选购问题，在开年期间也有非常大的优惠，详情也可以查看站内“优惠活动”了解。
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