what is it you want to monitor on your network? although i have not had experience with DNA reading up on it leads me to believe its main use is keeping track of inventory.

Offers detailed Hardware + Software Inventory with innovative Internet + Application Metering, Software Distribution, PC Remote Control and full Enterprise Reporting...

... Facilitating central management of your enterprise PCs in a secure, coordinated and efficient manner, NetSupport DNA combines powerful Hardware and Software Inventory with Software Distribution, Application and Internet Metering, Web Based Helpdesk and award winning Remote Control functionality.
http://www.netsupport-inc.com/

heres a link to an indepth review of it:

http://www.networkworld.com/reviews/...209revdna.html

here they say its inventory features shine while its other features kinda suck.

you might want to take a look at GFIlanguard from www.GFI.com

GFI LANguard N.S.S. scans your entire network, IP by IP, and provides information such as service pack level of the machine, missing security patches, wireless access points, USB devices, open shares, open ports, services/applications active on the computer, key registry entries, weak passwords, users and groups, and more. Scan results can easily be analyzed using filters and reports, enabling you to proactively secure your network - for example, by shutting down unnecessary ports, closing shares, installing service packs and hotfixes, etc.
i guess it all depends on what you want to keep track of.

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IMHO most of us come to AO to see what info we can pick up...to see what we can learn and to share what we have learned. tell somebody to google it and nobody learns anything. this site isn't as busy as at used to be and will get even slower if "google it" is the only answer someone can get. Although there are those where "google it" is just too good for the ignorant bastards.