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Nov 8, 2022
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[pull] master from KeKe-Li:master #386

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Update golang.01.md
KeKe-Li Nov 8, 2022
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Merge pull request #755 from KeKe-Li/feature-keke
KeKe-Li Nov 8, 2022
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Update golang.01.md
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@KeKe-Li
KeKe-Li authored Nov 8, 2022
commit 64802e8e9ee15bf769267a8fa76396e5d6f2fa70
2 changes: 1 addition & 1 deletion src/chapter08/golang.01.md
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Expand Up @@ -307,7 +307,7 @@ TCP是一种有连接的协议，但是这个连接并不是指有一条实际

但是B端不可能知道什么时候会出现这种异常，所以B端必须定时发送数据来检测连接是否异常断开。数据的内容无关紧要，任何数据都能达到这个效果。这个数据就是我们经常在TCP编程中所说的心跳。

TCP协议本身就提供了一种这样的机制来探测对端的存活。TCP协议有一个KEEP_LIVE开关，只要打开这个开关就会定时发送一些数据长度为零的探测心跳包，发送的频率和次数都可以设置，具体的方法在网上搜索tcp keepalive即可，网上有很多文章，这里不再赘述。
TCP协议本身就提供了一种这样的机制来探测对端的存活。TCP协议有一个KEEP_LIVE开关，只要打开这个开关就会定时发送一些数据长度为零的探测心跳包，发送的频率和次数都可以设置，具体的方法在网上搜索`tcp keepalive`即可，网上有很多文章，这里不再赘述。

除了使用TCP协议本身的保活开关机制，还可以在应用层主动发送心跳数据包，那么在应用层主动发送心跳数据包的方式和TCP协议本身的保活机制有什么区别呢？

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