Your computer name gets automatically registered in DNS and it requires no manual actions on anyone's part. If you feel that you have special addressing needs, please read on. It was becoming unruly and impossible for network personnel to manually administer the thousands or tens of thousands of computers and addresses for an organization. DHCP was invented to alleviate this problem. Therefore, you simply take your new computer out of the box, put it together, plug it into the network, and it starts working.
Every computer has a name which can be changed by the owner of that machine.
The configured name is sent as part of the DHCP request and, if not already taken, that name becomes the name or DNS name for your computer. If the name is taken, the system automatically adds a string to the end of the name to make it unique. Many people think they need a special address that never changes for their web server, their file server, a Polycom video conferencing unit, or some other specific project. While there are some cases where special addressing needs do exist, the above mentioned are not among them. As long a computer system is online at least once a week, it's IP address will not change.