假定网关IP为：172.168.6.1，则执行命令Ping 172.168.6.1。在MS-DOS方式下执行此命令，如果显示类似以下信息：
Reply from 172.168.6.1? bytes=32 time=9ms TTL=255
Ping statistics for 172.168.6.1?
Packets?Sent=4?Received=4?Lost=0?0% loss　?
Approximate round trip times in milli-seconds?
Minimum=1ms?Maximum=9ms?Average=5ms
则表明局域网中的网关路由器正在正常运行。反之，则说明网关有问题。
3、Ping远程IP
这一命令可以检测本机能否正常访问Internet。比如本地电信运营商的IP地址为：202.102.48.141。在MS-DOS方式下执行命令：Ping 202.102.48.141，如果屏幕显示：
Reply from 202.102.48.141? bytes=32 time=33ms TTL=252
Reply from 202.102.48.141? bytes=32 time=21ms TTL=252
Reply from 202.102.48.141? bytes=32 time=5ms TTL=252
Reply from 202.102.48.141? bytes=32 time=6ms TTL=252
Ping statistics for 202.102.48.141?
Packets?Sent=4?Received=4?Lost=0?0% loss　?
Approximate round trip times in milli-seconds?
Minimum=5ms?Maximum=33ms?Average=16ms
则表明运行正常，能够正常接入互联网。反之，则表明主机文件(windows/host)存在问题。