中兴公司的《常用网络协议原理》DOC，包括ATM基本原理，G.703建议，MPLS原理，OSPF协议，PPPOE，PPP协议，RIP协议，SNMP-ZTE Corporation's "Principle of common network protocol," DOC, including the basic tenets of ATM, G.703, MPLS principle, OSPF, PPPOE, PPP, RIP, SNMP