Several coding changes are needed to enable an application for IPv6 communications. Basic socket API extensions for IPv6 describes the changes to the basic Socket APIs that most applications use. Advanced socket APIs describes the changes to advanced functions (which are typically used by a small number of TCP/IP applications) of the socket APIs that facilitate IPv6 communications. The divisions in this topic describe some of the general considerations involved in enabling an application for IPv6. Note that while many of the examples and references in this topic assume the use of C/C++ sockets supported by the Language Environment®, most of the concepts (unless explicitly noted) apply to the other Socket API libraries that support IPv6. For a more detailed description of the actual APIs, see Basic socket API extensions for IPv6 and Advanced socket APIs, and information for the specific API you are using.