…runcating IPv4 addresses to 24 bits. 56 bits are recommended for IPv6, based on RFC6177 ]. ISPs should have more detailed knowledge of their own networks. That is, they might know that all 24-bit prefixes in a /20 are in the same area. In those cases, for optimal cache utilizatio…

…runcating IPv4 addresses to 24 bits. 56 bits are recommended for IPv6, based on RFC6177 ]. ISPs should have more detailed knowledge of their own networks. That is, they might know that all 24-bit prefixes in a /20 are in the same area. In those cases, for optimal cache utilizatio…