keep-alive 机制
时间: 2023-09-02 08:10:59 浏览: 44
Keep-alive机制是一种用于检测TCP连接是否依然存活的机制。它在TCP协议中起到监测连接状态、预防连接空闲时间过长导致连接被关闭的作用。然而,Keep-alive机制存在一些缺陷。首先,它只能知道对方是否还在与你保持连接,而无法判断对方是否能正常工作,即服务是否可用。其次,如果通信过程中一方突然断开连接,另一方没有收到确认信息,将会进行多次重传,但并不会触发Keep-alive机制。因此,在应用层可以加入心跳包机制来进行更高级别的判断对端服务是否可用的功能。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [TCP的keep-alive机制分析](https://blog.csdn.net/weixin_43679657/article/details/115620081)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [KeepAlive详解](https://blog.csdn.net/zhou920786312/article/details/119577556)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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