IPv4 and IPv6

Internet Protocol Version 4 (IPv4), is the most commonly used numbering system used to create IP addresses. IPv4 employs 32-bits of recombined digits and has a maximum of 4.3 billion possible addresses. IPv6 is a newer system for the creation of IP addresses. It uses 128 bits instead of 32 bits for its addresses, creating trillions of new IPv6 addresses, enough to support the demand for IP addresses for some expected time to come.