You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets．Which network address and subnet mask meet this requirement?
  • 1、
【正确答案】 1、A    
【答案解析】需要3个有效地址，块大小最小为8，还要提供最大数量的子网，所以用最块大小8，掩码255．255．255．248