DNS Transport Size Issues in IPv6 Environment

The nature of data exchanged between DNS (Domain Naming System) servers and resolvers has been changed since the introduction of IPv6 (Internet Protocol version 6) because of the increased address length and other technical enhancements. These changes and recent security concerns raise questions against fundamental design principles of the DNS protocols, especially to the transport layer and the payload size. In this paper we review how DNS protocols will be affected by the requirements and production-level deployment of IPv6, and how the new requirements for larger-size transfer should be satisfied by enhancing and/orredesigning the existing DNS transport layer protocols.