connectionless service meaning in English

无连接服务
无连接业务

The most important characteristic of those networks is that they only offer unreliable and connectionless services
其最大的特点就是：为ip网络提供不可靠，无连接的数据报服务。
The session layer uses wsp ( wireless session protocol ) and provides two session services for the wae layer with known interfaces . these services refer to connection - based service from the wtp layer to ensure data transmission and connectionless service , not to ensure data transmission
会话层采用wsp （ wirelesssessionprotocol ），使用已知的接口为wae层提供两种会话服务：来自于wtp层的基于连接的服务以确保数据传输；以及不确保数据传输的无连接服务。