题目内容
（请给出正确答案）
[主观题]
（67）A.IEEE802.11aB.IEEE802.11bC.IEEE802.11gD.IEEE802.11n
（67）
A.IEEE802.11a
B.IEEE802.11b
C.IEEE802.11g
D.IEEE802.11n
提问人：网友zhj751103
发布时间：2022-01-06
如搜索结果不匹配，请 
The defacto standard Application Program Interface （API） for TCP/IP applications is the “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
