在路由器MSR-1上看到如下提示信息:[MSR-1]displayfirewall-statisticsallFirewallisenable,defaultfilteringmethodis’permit’.Interface:GigabitEthernet0/0In-boundPolicy:acl3000FragmentsmatchednormallyFrom2008-11-082:25:13to2008-11-082:25:460packets,0bytes,0%permitted,4packets,240bytes,37%denied,7packets,847bytes,63%permitteddefault,0packets,0bytes,0%denieddefault,Totally7packets,847bytes,63%permitted,Totally4packets,240bytes,37%denied.据此可以推测()。