PPP (Point-to-Point Protocol) is one of the protocols,which is applied most extensively in WAN at present. PPP is the link layer protocol design for transmitting the data packets between the coequal units.

• PPP协议 (Point to PointProtocol)是目前广域网上应用最广泛的协议之一 ,PPP是为在同等单元之间传输数据包而设计的链路层协议。