Because the popular network operating system (Windows, Linux, Unix, etc) almost support TCP/IP, hosts are usually equipped with Telnet server and may offer Telnet service.

• 由于当前流行的各种网络操作系统(Windows、Linux、Unix等)都支持TCP/IP协议,因此都随机安装了telnet服务器,为远程客户端提供telnet服务。