The number of bits in IPv6 addresses is 128 bits. The Internet Protocol (IP) is a collection of rules for routing and addressing data packets so that they can transit across networks and reach their intended destination. Data traveling over the Internet is broken down into smaller units known as packets. Each packet has IP information attached to it, which helps routers send packets to the correct location. Every device or domain that connects to the Internet is given an IP address, and data arrives where it is needed as packets are routed to the IP address assigned to them. Depending on whether transport protocol is used in conjunction with IP, packets are handled differently after they arrive at their destination. During the year 1994, the Internet Engineering Task Force (IETF) initiated the development of the Internet Protocol version 6 (better known as IPv6). IPv6 addresses have a size of 128 bits. As a result, compared to IPv4, IPv6 has a much larger address space. All IPv6 addresses are 128 bits long, written as 8 sections of 16 bits each. They are expressed in hexadecimal representation, so the sections range from 0 to FFFF.