is_network method
Checks if the IP address is actually a network
ip = IPAddress("172.16.10.64/24")
ip.network? /// false
ip = IPAddress("172.16.10.64/26")
ip.network? /// true
Implementation
bool is_network() {
return this.prefix.num != this.ip_bits.bits &&
this.host_address == this.network().host_address;
}