In IPv4, which uses 4x bytes or 32 bits, there is a theoretical maximum of 4,294,967,296 IP addresses. In IPv6, which attempts to resolve the address shortage, uses 128bits, giving a maximum of ~ 340,282,366,920,938,463,463,374,607,431,770,000,000 addresses.
In.addr-arpa (ali66reza)
The address space of IPV4 is limited to 4294967296 possible unique addresses.
192.169.32.1
One major block of addresses reserved for special purposes is the IPv4 experimental address range 240.0.0.0 to 255.255.255.254. Currently, they cannot be used in IPv4 networks. However, these addresses could be used for research or experimentation.
In IPv4, the loopback address is 127.0.0.1. In IPv6 it is ::1.
Octets
IPV6 is less vulnerable to DNS Spoofing IPv4 addresses use 32 bit or 4 bytes for addressing IPv6 addresses use eight bit segments.
Pv4 uses 32-bit (four-byte) addresses. which limits the address space to 4,294,967,296 (232) possible unique addresses. However, some are reserved for special purposes such as private networks (~18 million addresses) or multicast addresses (~270 million addresses). This reduces the number of addresses that can potentially be allocated for routing on the public Internet. As addresses are being incrementally delegated to end users, an IPv4 address shortage has been developing.
When applying IPv4 addresses to router interfaces on a network, you would manually configure predictable addresses. For example, the lowest or highest address of the local subnet, on each particular router interface.
IPv4 addresses are 4 bytes. IPv6 IP addresses are 16 bytes.
Number 0 is used at the end of an IPv4 address for network identifiers and number 255 is used at end of an IPv4 for broadcast addresses.