什么是地址族？
当我阅读套接字编程时，我了解到 AF_ 代表地址族。但从字面上看，一个家庭应该有很多成员。那么，AF_INET 地址族有哪些成员呢？
在我看来，我认为说“地址类型”比“地址家庭”更合适。这也适用于 PF（协议族）。
谢谢。
When I read about socket programming, I get to know that AF_ stands for Address Family. But literally, a family should have many members. So, what are the members of, say, AF_INET address family?
In my opinion, I think it would be more appropriate to say Address Type than Addresss Family. Also this applies to PF (Protocol Family).
Thanks.
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AF_INET地址族的成员是 IPv4 地址。AF_INET6地址族的成员是 IPv6 地址。AF_UNIX 地址族的成员是 Unix 域套接字的名称（例如 /var/run/mysqld/mysqld.sock ）。
AF_IPX地址族的成员是 IPX 地址，依此类推。我认为您真的不需要在这里区分家庭和类型。这些只是同义词；除了“family”看起来更专业，非常适合此目的，而“type”则负担过重，过于笼统。
最终，这是一个约定。有太多的文献使用“地址族”，以至于它已经成为一个行之有效的术语，即使不是人类的一生，也已经有几十年的历史了。
Members of
AF_INETaddress family are IPv4 addresses.Members of
AF_INET6address family are IPv6 addresses.Members of
AF_UNIXaddress family are names of Unix domain sockets (/var/run/mysqld/mysqld.sockis an example).Members of
AF_IPXaddress family are IPX addresses, and so on.I don't think you really need to distinguish between family and type here. These are merely synonyms; except that family looks more specialized, well-suited for this purpose, whilst type is much overloaded, way too general word.
Ultimately, it's a convention. There's just so much literature using "address family" that it's well-established terminology, by decades if not human lifetimes.