IPv4 is a connectionless protocol for use on packet-switched networks. It operates on a best effort delivery model, in that it does not guarantee delivery, nor does it assure proper sequencing or avoidance of duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol, such as the TCP. Enter an IPv4 address i.e. 192.168.1.0
Prefix size
IPv6
IPv6 is the successor to the first addressing infrastructure of the Internet, Internet Protocol version 4. In contrast to IPv4, which defined an IP address as a 32-bit value, IPv6 addresses have a size of 128 bits. Therefore, IPv6 has a vastly enlarged address space compared to IPv4. Enter an IPv6 address and prefix length bellow i.e. 2001:0db8:85a3:0000:0000:8a2e:0370:7334