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82问答网 > 为什么UDP服务器仅需要一个套接字，而TCP服务器需要两个？

为什么UDP服务器仅需要一个套接字，而TCP服务器需要两个？

2025-03-16 09:04:56

推荐回答（4个）

回答1：

也是一个.
监听不同客户机接入的不同套结字,然后接受 ,建立Socket连接.

回答2：

对于服务端来说TCP进程有两个套接字, 一个是三次握手时使用的`欢迎套接字`, 另一个是专门对客户进行连接的新生成的套接字,称为`连接套接字`. UDP不需要三次握手,所以会在每个分组中携带目的地址. 不同的客户端和服务器连接都是先和`欢迎套接字`握手,连接后马上生成一个新的`连接套接字` 所以TCP服务器需要n+1个套接字就可以了.

回答3：

26. With the UDP server, there is no welcoming socket, and all data from different clients enters the server through this one socket. With the TCP server, there is a welcoming socket, and each time a client initiates a connection to the server, a new socket is created. Thus, to support n simultaneous connections, the server would need n+1 sockets.

回答4：

TCP会多出一个欢迎套接字，结果是n+1

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