Skip to content

Update 计算机网络.md #18

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
daoxusheng wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Update 计算机网络.md #18

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion 计算机网络.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@

但是我不能一直连接啊，如果客户端消失了难倒我服务器端还傻傻的等待吗？这里面有一个机制叫做保活机制。在一段时间内连接处于非活动状态（一般是两个小时），那么服务器端将向客户端发送一个报文，如果服务端没有收到回应，则在一定时间间隔内还会继续发送。当发送次数达到阈值（保活次数）后，确认对方主机不可达，断开连接。发送探测消息，客户端有四种状态：

1. 对方主机正常，但对方不想赢，超过次数后关闭
1. 对方主机正常，但对方不响应，超过次数后关闭
2. 对方正常，但因为网络原因没收到确认报文
3. 对方主机崩溃了，不会响应报文
4. 对方主机崩溃然后重启，服务器会受到响应报文，然后关掉链接
Expand Down