Your can provide hardware firewall protection for your home network where it connects to the isp's network, just as isp networks have firewalls where they connect to the internet.

router.

Explanation:

Router is the main connection for a house network to the Internet, the firewall function is combined to the router. Every house network must have a firewall to protect their privacy.

The router provides the hardware firewall while the windows provides the software firewall.So the answer to this question is router.

depends on what software you are using. google docs or microsoft word or other?