SQL Server 2005: Why do I have a tcp address as part of my server name?

1) How did it get such a convoluted name

2) Is it advisable to change it

3) Why is command prompt prompting me if I want to change it

4) If I choose not to change it, will I continue to get such prompts in the future

5) If I choose to change it, will it affect the operation of stored procedures therein.

The name is of the form tcp:12.34.56.12.3456\nam