which domain is better for my site
 

Hello, I have 3 domains one of them with the word network (this is main one) .com another one with the word host .com another...

Whats your website about ? Domain name for a website should be related with your site content . .com is good always . So, you can found which domain name is more suitable for your website and then register it with any of the domain providers like 9cubehosting.com at low cost