win7的hosts为什么是空的?

因为hosts这是一个兼容性的文件， 没有DNS服务器之前，域名解析依靠的就是hosts文件，后来才有的DNS服务器，为了兼容才继续保留这个文件的，空也很正常。。不过有时候，用它来屏蔽掉一些网站。。

加上这些就行了：

# Copyright (c) 1993-2009 Microsoft Corp.

#

# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.

#

# This file contains the mappings of IP addresses to host names. Each

# entry should be kept on an individual line. The IP address should

# be placed in the first column followed by the corresponding host name.

# The IP address and the host name should be separated by at least one

# space.

#

# Additionally, comments (such as these) may be inserted on individual

# lines or following the machine name denoted by a '#' symbol.

#

# For example:

#

# 102.54.94.97 rhino.acme.com # source server

# 38.25.63.10 x.acme.com # x client host

# localhost name resolution is handled within DNS itself.

127.0.0.1 localhost

::1 localhost

134.170.108.26 onedrive.live.com

134.170.109.48 skyapi.onedrive.live.com

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