答案 0 :(得分:3)
是有许多点的网址有效。但是,具有多个连续点的域名无效,因为每个标签的长度必须大于0.
请参阅:
https://lists.isc.org/pipermail/bind-users/2011-January/082725.html
要熟悉URL语义,您需要阅读:
Which characters make a URL invalid?
简而言之,域名部分中可能有多少个点。但是,这些点之间至少应该有1到63个字符的标签。请参阅:
http://en.m.wikipedia.org/wiki/Domain_Name_System#Domain_name_syntax
答案 1 :(得分:0)
好像有效。
请参阅未保留部分中允许的字符的描述:
http://tools.ietf.org/html/rfc3986#section-2.3
2.3. Unreserved Characters
Characters that are allowed in a URI but do not have a reserved
purpose are called unreserved. These include uppercase and lowercase
letters, decimal digits, hyphen, period, underscore, and tilde.
unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"