1. Why would you host a domain?
There are 3 main reasons which make domain hosting the best choice:
1. First, because your WEB server has to be accessible 24h/24h, 365 days a year, and be connected to the Internet backbone through high bandwith lines in order to fulfill a great number of requests.
2. Then because you don't have the hassle of managing and administrating your web server permanently: NetServ does that for you.
3. Last but not least for security reasons: because your WEB server is on your network and visible from the outside world, complex and fastidious security measures have to be implemented to avoid any intrusion or hacking of your network.