Firewall question

I'm a newbie to these forums, and have learned a lot just browsing. Thanks to all the helpful wizards, gurus, etc. who make places like this possible. And thanks for your help on this one.

I'm not sure if this is the right forum for this question, but one has to start somewhere, so...

I have 4 PCs on a LAN sharing a wireless internet connection. I have ZoneAlarm installed on the PC with the wireless card; do I need to install it on the other 3 PCs as well?

Thanks again.

Lou

 

Not necessary. Just a firewall at your point of connection to the net.