两台路由器MSR-1、MSR-2通过RIP完成路由的动态学习,在MSR-1上看到如下debug信息: *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG:// RIP 1 : Sending v2 request on Serial 0/0 from 3.3.3.3 *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG:// RIP 1 :Sending request on interface Serial0/0 from 3.3.3.3 to 224.0.0.9 *Nov 26 02:20:25:400 2008 H3C RM/6/RMDEBUG:// RIP 1 : Receiving v2 request on Serial0/0 from 3.3.3.1 根据debug信息可以推测()