通过psping测试结果，初步判断远端服务器的状态

C:\Users\he.liming>psping 139.219.66.205:4352

PsPing v2.10 - PsPing - ping, latency, bandwidth measurement utility
Copyright (C) 2012-2016 Mark Russinovich
Sysinternals - www.sysinternals.com

TCP connect to 139.219.66.205:4352:
5 iterations (warmup 1) ping test:
Connecting to 139.219.66.205:4352 (warmup): from 172.31.*.*:55920: 38.92ms
Connecting to 139.219.66.205:4352: from 172.31.*.*:55921: 39.01ms
Connecting to 139.219.66.205:4352: from 172.31.*.*:55922: 39.26ms
Connecting to 139.219.66.205:4352: from 172.31.*.*:55923: 38.87ms
Connecting to 139.219.66.205:4352: from 172.31.*.*:55924: 39.08ms

TCP connect statistics for 139.219.66.205:4352:
  Sent = 4, Received = 4, Lost = 0 (0% loss),
  Minimum = 38.87ms, Maximum = 39.26ms, Average = 39.05ms