该程序模拟了服务器对域名的各种操作，有对域名的查找，有对以有域名的删除，有对以有域名的更新，有插入新的域名和通过时间来查找域名的功能。-the simulation domain name server on the operation, the search for the domain name, a right to a domain name deleted, a right to a domain name updates, insert a new domain name and through time to find the function of the domain name.