什么是插座？是一个过程吗？
what is a socket? Is it a process?
我正在研究 os 概念，我发现套接字是通信的终点。现在究竟什么是套接字？它是系统通信的过程吗？
提前致谢
通过阅读维基百科文章，我明白了为什么您可能会感到困惑。
套接字是一个虚拟设备。也就是说，它是一种用软件编写的设备，没有物理设备。因此，您可以像对终端所做的那样从套接字读取和写入。
套接字成对工作以进行通信，通常是双向的。读取套接字 (A) 并写入套接字 (B) --- 或 ---- 写入套接字 (A) 并从套接字读取 --- 或 --- 来回切换。
套接字一般用于网络通信。它们通常可以支持多种协议（TPC/IP、UDP/IP，甚至是 DECnet——范围取决于底层系统）。
套接字也可用于单个系统上的进程间通信。
大多数 c 系列语言及其基础语言将套接字实现为 Berkeley sockets which are implemented as file descriptors。来自维基百科：
In the traditional implementation of Unix, file descriptors index into
a per-process file descriptor table maintained by the kernel, that in
turn indexes into a system-wide table of files opened by all
processes, called the file table. This table records the mode with
which the file (or other resource) has been opened: for reading,
writing, appending, and possibly other modes. It also indexes into a
third table called the inode table that describes the actual
underlying files.[3] To perform input or output, the process passes
the file descriptor to the kernel through a system call, and the
kernel will access the file on behalf of the process. The process does
not have direct access to the file or inode tables.
所以在高层次上，套接字被实现为文件，其文件描述符或句柄被引用为套接字的标识符。
我正在研究 os 概念，我发现套接字是通信的终点。现在究竟什么是套接字？它是系统通信的过程吗？ 提前致谢
通过阅读维基百科文章，我明白了为什么您可能会感到困惑。
套接字是一个虚拟设备。也就是说，它是一种用软件编写的设备，没有物理设备。因此，您可以像对终端所做的那样从套接字读取和写入。
套接字成对工作以进行通信，通常是双向的。读取套接字 (A) 并写入套接字 (B) --- 或 ---- 写入套接字 (A) 并从套接字读取 --- 或 --- 来回切换。
套接字一般用于网络通信。它们通常可以支持多种协议（TPC/IP、UDP/IP，甚至是 DECnet——范围取决于底层系统）。
套接字也可用于单个系统上的进程间通信。
大多数 c 系列语言及其基础语言将套接字实现为 Berkeley sockets which are implemented as file descriptors。来自维基百科：
In the traditional implementation of Unix, file descriptors index into a per-process file descriptor table maintained by the kernel, that in turn indexes into a system-wide table of files opened by all processes, called the file table. This table records the mode with which the file (or other resource) has been opened: for reading, writing, appending, and possibly other modes. It also indexes into a third table called the inode table that describes the actual underlying files.[3] To perform input or output, the process passes the file descriptor to the kernel through a system call, and the kernel will access the file on behalf of the process. The process does not have direct access to the file or inode tables.
所以在高层次上，套接字被实现为文件，其文件描述符或句柄被引用为套接字的标识符。