Refer to the exhibit． Subnet 10．1．3．0/24 is unknown to router RTB． Which router command will prevent router RTB from dropping a packet destined for the 10．1．3．0/24 network if a default route is configured?
  • 1、
【正确答案】 1、A    
【答案解析】缺省路由也配置了，为了安全起见，我们还是把无类路由打开。