显示当前网络连接状况 netstat
显示网络连接，路由表，接口统计数据、伪装链接和多播成员关系！
Print network connections, routing tables, interface statis-tics, masquerade connections, and multicast memberships.
GZIP在网络连接慢的情况下最有用，在这种情况下，数据传输耗用了用户等待将显示的页面所花费的大部分时间。
GZIP is most useful in the case of a slow network connection in which the transmission of data consumes a significant portion of the time a user waits for the page to be displayed.
在图1中，管理网络连接用红色显示。
In Figure 1, the management network connections are shown in red.
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