摘要： http://www.hscripts.com/tutorials/web/domain-characters.phpDomain Name: A Domain Name can have alphabets, numbers and hyphen (-).The following are the main criteria or characteristics that a domain name can have.a) Alphabets are accepted (e.g: withfriendship).b) Numbers are accepted (e.g: 12343121). 阅读全文

摘要： http://www.zytrax.com/books/dns/ch8/hinfo.htmlAllows definition of the Hardware type and Operating System (OS) in use at a host. For security reasons these records are rarely used on public servers. If a space exists in the field it must be enclosed in quotes. Single space between CPU and OS parame 阅读全文