CIDR Classless InterDomain Routing block supernetting CIDR CIDR CIDR Classless InterDomain Routing block CIDR (Classless Inter-Domain Routing or supernetting) Classless Inter-Domain Routing Classless InterDomain Routing block CIDR CIDR Classless Inter-Domain Routing CIDR CIDR CIDR CIDR (Classless Inter-Domain Routing or supernetting) Classless Inter-Domain Routing Classless InterDomain Routing block CIDR