本文在阐述网络发展的现状和趋势的基础上，着重分析了两种内 部网关路由选择协议砒P和OSPF协议的实现机制和性能特点。并进行OPNET网络仿真-On the basis of illustrating the present situation and tendency of network，in this p印er we pay more attention on analysis of mechanism and perfIomances of觚o int耐or gateway p