Implementation of PPP in High-speed Network and Research of Its Security Mechanism

The article presents the implementation technology of PPP protocol over high-speed SDH/SONET fiber networks, and applies it to the building of high-speed router.In the implementation architecture, PPP software has a lowed-level interface with hardware drivers,which processes received PPP packets. The higher-level interfaces include those with network layer protocols suck as IP and IPX which send IP/IPX packets to network layer for further processing,and provide the complete control mechanisms for sending network layer packets. Additionally, we discuss the security problem of PPP protocol, including encryption and authentication techniques, which ensures the safety of packets in transit.