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To eliminate these mentioned problems, a new version of the Internet protocol (IPv6) was introduced in 1990s. For main reason, this new network layer protocol was designed to increase the IP address size from 32bits to 128 bits, which could supply nearly unlimited IP address to all services and devices. In addition, comparing with IPv4, IPv6 protocol brings more safe and secure communications and data transfers. The new features, possibilities and improvements of IPv6 protocol would extremely enhance the performance of today’s network. Although IPv6 protocol has many advantages, implementations and applications of IPv6 protocol in real network are still slow and difficult.
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