某网络中PC1无法访问域名为www.test.com网站,管理员在PC1上执行ping命令时有如下所示信息: C:>ping www.test.com Pinging www.test.com[202.117.112.36] with 32 bytes of data: . Reply from 202.117.112.36: Destination net unreachable.Reply from 202.117.112.36:Destination net unreachable. Reply from 202.117.1 12.36:Destination net unreachable. Reply from 202.1 17.112.36: Destination net unreachable. Ping statistics for 202.117.112.36: Packets: Sent=4,Received=4,Lost=O(0% loss), Approximate round trip tunes in milli-seconds: Minimum=0ms, Maximum=0ms, Average=0ms造成该现象可能原因是( )。
首先语句“Pinging www.test.com [202.117.112.36] with 32 bytes of data”说明己经解析到了IP地址,排除DNS故障; DNS是应用层服务,因此下层工作都正常。只可能遭受了ACL拦截时会出现服务器应答数据被过滤情况。









