Abstract: A system for providing a co-location service comprises a plurality of switching hubs for changing public IP address into private IP address, a plurality of giga lines for connecting the switching hubs, a L4 switch for performing the server load balancing, a customer server connected to the L4 switch by means of the private IP networks and a GLB server for finding a shortest path for a client computer.

Abstract: A contents synchronization method comprises steps for: setting the synchronization policy; monitoring files and directories of a specific server in real time; checking whether there is content modification; performing said monitoring step again if there are no modification, but if there is modification, notifying to the CD Master server in real time that there is modification; confirming whether there is failure among the CD Master server, the CMS server, the CAS servers; selecting a contents routing path if there is modification; selecting a contents routing path if there is no modification; instructing a synchronization command to transmit said modified contents to target servers; transmitting the contents to target servers; notifying the transmission results; confirming whether there is a next contents routing path; performing said step for confirming again whether there is failure if there is a next contents routing path but completing the contents synchronization if there is no path.

Abstract: A method for resolution services of special domain names includes receiving and storing information related to domain names and keywords whenever at least one contents provider connects to a special domain name resolution server and requests a registration; linking the at least one contents provider which is registered with the special domain name resolution server to a special domain name service program and a special domain name database information; automatically installing the special domain name service program by downloading the special domain name service program and the special domain name database to a terminal of a connection service user upon the user connecting to contents of the at least one contents provider; and transferring to the user's terminal an IP address corresponding to a queried domain name that the user's terminal queried to the special domain name server by identifying a domain name and the user's IP address.