The Basic Class Virtual Terminal Service(VTS) is an A SE in the OSI application layer. 基本类虚终端是OSI应用层中的一个应用服务元素ASE。
Remote accessing is one of the most useful applications in Internet, and Telnet is the factual standard to realize it. It provides a standard interface for guests when they access a remote host that is Network Virtual Terminal Service(VTS). 远程登录是互连网上最常用的应用之一,而Telnet已经是Internet上实现远程登录的事实标准,它为客户访问一个远程主机提供一个标准接口,即网络虚拟终端服务(VTS)。