The firewalls that will be discussed in this article are hardware firewalls, and not firewall software. Software combined with a wireless router is appropriate for most home users, while businesses and individuals running sigificantly sized networks with fair traffic should look to the added protection of a physical firewall.
If you have wireless network routers or servers may be include an internal firewall. If not, you should certainly buy a firewall, especially in cases where you have a large network of computers working off the same router and wireless connections. Today's firewalls almost always including router technology and most modern routers double as firewalls. Most threats against a computer system could be prevented by adding a firewall to the mix.
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