ping

<h3>本地址</h3> <p><img src="https://www.showdoc.cc/server/api/common/visitfile/sign/8a09c7bc5fca28422285b2fc3893aece?showdoc=.jpg" alt="" /></p> <h3>国内地址</h3> <p><img src="https://www.showdoc.cc/server/api/common/visitfile/sign/ce559e7a2a87601f3761319ecf36aa94?showdoc=.jpg" alt="" /> <img src="https://www.showdoc.cc/server/api/common/visitfile/sign/dc066eb070c3cad5fb29743bc04fdf52?showdoc=.jpg" alt="" /></p> <h3>国外地址</h3> <p><img src="https://www.showdoc.cc/server/api/common/visitfile/sign/4b77e9f7f1c0e3db4d1d849dcb0f49c8?showdoc=.jpg" alt="" /> <img src="https://www.showdoc.cc/server/api/common/visitfile/sign/8bd7d02609118480e6bc03174b42f92f?showdoc=.jpg" alt="" /></p> <h3>总结</h3> <ol> <li>深圳到广州距离：S=v*t=3 * 10^8 * 9 * 10^-3 * 10^-3 km=2700.8km;</li> <li>深圳到美国距离：S=v*t=3 * 10^8 * 193 * 10^-3 * 10^-3 km=57900km</li> <li>time是往返时延，IP地址在不同的地方，时延不一样</li> <li>距离越远，时延越长，远的地方就要有边缘服务器或者CDN，才能满足全国或全球架构要求</li> </ol>