“sockets” interface. Although this API was developed for __(71)__ in the early 1980s it has also been implemented on a wide variety of non-Unix systems。 TCP/IP __(72)__ written using the sockets API have in the past enjoyed a high degree of portability and we would like the same __(73)__ with IPv6 applications。 But changes are required to the sockets API to support IPv6 and this memo describes these changes。These include a new socket address structure to carry IPv6 __(74)__,new address conversion functions,and some new socket options。These extensions are designed to provide access to the basic IPv6 features required by TCP and UDP applications,including multicasting, while introducing a minimum of change into the system and providing complete __(75)__ for existing IPv4 applications。
A.Windows
B.Linux
C.Unix
D.DOS