title: Why is 10.0.0.1/28 not a valid subnet within a VPC of 10.0.0.0/24?
body: <p>How to create Multiple Subnets within Range 10.0.0.0/24.
  Tried creating 10.0.0.1/28 . It tells it should be within the CIDR Range. 
  I am sure am making something wrong . Please advise. </p>