# Copyright (c) 1993-1999 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
127.0.0.1 localhost
这是hosts中默认的内容，由上面的解释说明文字我们可以知道，hosts的格式为 ip 空格 主机名，此为一条记录，每条记录占一行。而每一行中#以后的文字是解释说明文字，系统在调取信息时会忽略这一部分。系统默认情况下只在hosts添加了一条信息，便是127.0.0.1，指向localhost。
