分别用公司的网络(北京移动)，还有自己的 4G(北京移动，北京联通)热点测了一下。
测试方法：tcping -t
github.com 443，浏览器并没有打开
github.com ，只是单纯的 tcping...
规律如下：
公司网络(北京移动) ，4G 热点(北京移动)：
跟楼主一样，每次超时，时间是非常准确的 3 分钟。比北京的“大姨妈式进京证”还要准确。
超时后，会出现短暂的 ping 通，时间不等，最短只 ping 通一次，最长几十秒。
4G 热点(北京联通)：
非常有规律的超时，且每次超时只维持 1，2 次 No response，其余时间都是 ping 通。每段 ping 通的时长，大概是 10s 或者 5s 。没有过多测试。这部分的具体数据如下：
```
C:\Users\**>tcping -t
github.com 443
** Pinging continuously. Press control-c to stop **
Probing 52.74.223.119:443/tcp - Port is open - time=1206.298ms
Probing 52.74.223.119:443/tcp - Port is open - time=139.423ms
Probing 52.74.223.119:443/tcp - No response - time=2001.500ms
Probing 52.74.223.119:443/tcp - No response - time=2001.029ms
Probing 52.74.223.119:443/tcp - Port is open - time=545.484ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.312ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.441ms
Probing 52.74.223.119:443/tcp - Port is open - time=137.531ms
Probing 52.74.223.119:443/tcp - Port is open - time=141.392ms
Probing 52.74.223.119:443/tcp - Port is open - time=154.307ms
Probing 52.74.223.119:443/tcp - Port is open - time=157.207ms
Probing 52.74.223.119:443/tcp - Port is open - time=1150.087ms
Probing 52.74.223.119:443/tcp - Port is open - time=167.929ms
Probing 52.74.223.119:443/tcp - Port is open - time=143.909ms
Probing 52.74.223.119:443/tcp - Port is open - time=293.581ms
Probing 52.74.223.119:443/tcp - Port is open - time=1175.954ms
Probing 52.74.223.119:443/tcp - Port is open - time=152.318ms
Probing 52.74.223.119:443/tcp - Port is open - time=143.159ms
Probing 52.74.223.119:443/tcp - Port is open - time=149.835ms
Probing 52.74.223.119:443/tcp - Port is open - time=272.407ms
Probing 52.74.223.119:443/tcp - Port is open - time=141.300ms
Probing 52.74.223.119:443/tcp - Port is open - time=1174.043ms
Probing 52.74.223.119:443/tcp - Port is open - time=157.583ms
Probing 52.74.223.119:443/tcp - Port is open - time=160.159ms
Probing 52.74.223.119:443/tcp - Port is open - time=1171.108ms
Probing 52.74.223.119:443/tcp - Port is open - time=140.294ms
Probing 52.74.223.119:443/tcp - Port is open - time=1146.048ms
Probing 52.74.223.119:443/tcp - Port is open - time=156.782ms
Probing 52.74.223.119:443/tcp - Port is open - time=145.642ms
Probing 52.74.223.119:443/tcp - Port is open - time=134.585ms
Probing 52.74.223.119:443/tcp - No response - time=2001.431ms
Probing 52.74.223.119:443/tcp - Port is open - time=1158.397ms
Probing 52.74.223.119:443/tcp - Port is open - time=147.623ms
Probing 52.74.223.119:443/tcp - Port is open - time=146.323ms
Probing 52.74.223.119:443/tcp - Port is open - time=280.270ms
Probing 52.74.223.119:443/tcp - Port is open - time=1182.085ms
Probing 52.74.223.119:443/tcp - Port is open - time=176.244ms
Probing 52.74.223.119:443/tcp - Port is open - time=156.240ms
Probing 52.74.223.119:443/tcp - Port is open - time=165.209ms
Probing 52.74.223.119:443/tcp - Port is open - time=145.192ms
Probing 52.74.223.119:443/tcp - Port is open - time=1173.106ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.359ms
Probing 52.74.223.119:443/tcp - Port is open - time=139.380ms
Probing 52.74.223.119:443/tcp - Port is open - time=152.978ms
Probing 52.74.223.119:443/tcp - Port is open - time=170.191ms
Probing 52.74.223.119:443/tcp - Port is open - time=176.179ms
Probing 52.74.223.119:443/tcp - Port is open - time=176.526ms
Probing 52.74.223.119:443/tcp - Port is open - time=155.801ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.890ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.561ms
Probing 52.74.223.119:443/tcp - Port is open - time=140.476ms
Probing 52.74.223.119:443/tcp - Port is open - time=1160.078ms
Probing 52.74.223.119:443/tcp - Port is open - time=151.960ms
Probing 52.74.223.119:443/tcp - Port is open - time=1157.914ms
Probing 52.74.223.119:443/tcp - Port is open - time=1172.587ms
Probing 52.74.223.119:443/tcp - No response - time=2000.507ms
Probing 52.74.223.119:443/tcp - Port is open - time=156.721ms
Probing 52.74.223.119:443/tcp - Port is open - time=1169.221ms
Probing 52.74.223.119:443/tcp - Port is open - time=168.544ms
Probing 52.74.223.119:443/tcp - Port is open - time=142.525ms
Probing 52.74.223.119:443/tcp - Port is open - time=138.443ms
Probing 52.74.223.119:443/tcp - Port is open - time=148.958ms
Probing 52.74.223.119:443/tcp - Port is open - time=140.405ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.996ms
Probing 52.74.223.119:443/tcp - Port is open - time=151.621ms
Probing 52.74.223.119:443/tcp - Port is open - time=158.897ms
Probing 52.74.223.119:443/tcp - Port is open - time=149.869ms
Probing 52.74.223.119:443/tcp - Port is open - time=135.513ms
Probing 52.74.223.119:443/tcp - Port is open - time=147.747ms
Probing 52.74.223.119:443/tcp - Port is open - time=1173.130ms
Probing 52.74.223.119:443/tcp - Port is open - time=154.095ms
Probing 52.74.223.119:443/tcp - Port is open - time=159.471ms
Probing 52.74.223.119:443/tcp - Port is open - time=152.155ms
Probing 52.74.223.119:443/tcp - Port is open - time=178.374ms
Probing 52.74.223.119:443/tcp - Port is open - time=162.425ms
Probing 52.74.223.119:443/tcp - Port is open - time=153.748ms
Probing 52.74.223.119:443/tcp - No response - time=2001.547ms
Probing 52.74.223.119:443/tcp - Port is open - time=147.753ms
Probing 52.74.223.119:443/tcp - Port is open - time=150.426ms
Probing 52.74.223.119:443/tcp - Port is open - time=146.645ms
Probing 52.74.223.119:443/tcp - Port is open - time=140.087ms
Probing 52.74.223.119:443/tcp - Port is open - time=161.604ms
Probing 52.74.223.119:443/tcp - Port is open - time=1136.879ms
Probing 52.74.223.119:443/tcp - Port is open - time=155.782ms
Control-C
```
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