因为索引会带来额外的数据更新开销，所以应该争取创建少量索引来覆盖尽可能多的查询。
Because each index incurs extra data updating overhead, the goal should be to create a small number of indexes to cover as many queries as possible.
索引结构可以为个别包查找提供良好的性能，但SACK选项可能会覆盖包括多个包在内的任意多的字节数。
The index structure will give good performance looking up individual packets, but a SACK option can cover arbitrary byte ranges that include multiple packets.
另谷歌担心的是微软会借助自己在民用电脑和浏览器上的覆盖率修改默认设置，这将不利于谷歌的搜索引擎和其它的服务项目。
Google's fear has been that Microsoft might use its grip on people's computers and browsers to tweak the default Settings so that Google's search engine and other services might be disadvantaged.
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