Is additional firewall necessary?

From: Dickie Peters <ferrante276-ng@xxxxxxxxx>
Date: Sun, 21 Jan 2007 21:11:52 -0500

Is a software firewall such as Zone Alarm essential for added
protection if I am already using the XP firewall, AVG antivirus (free)
and have a wired router (D-link-524)? Will it offer me any additional
protection? If so, is there a better free firewall than Zone alarm?

Thanks.
.

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