Advantages:
- Adds an additional layer of protection to a network.
- A cheaper alternative to installing IPS.
- Helps to identify and stop attacks before they reach the internal network.
- Comes bundled with the ASA software, no additonal license required.
See the link below for details:
http://www.cisco.com/en/US/products/ps6120/products_tech_note09186a0080bd3913.shtml
Don't forget to rate all posts that are helpful.