20,980 pts.

Answer Wiki:
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See, There r several no of network monitoring sw in the market. No one can be guaranteed u this is the best ! Various people have various opinions. Though u didn't mention here what OS u r using. I am providing an in-built tool for Server 2003
1. Open Add/Remove Programs in the Control Panel
2. Click the Add/Remove Windows Components button
3. Select Management and Monitoring Tools, and then click Details
4. In this window, select the Network Monitor Tools check box, and then click OK
5. Click Next, if prompted for additional files insert ur Windows 2003 Server CD or type the appropriate network path to these files
6. Click finish with installation is complete

For Linux:
Top : ManageEngine OpManager www.manageengine.com
1. netstat
2. iptraf (u have to download from: http://iptraf.seul.org/download.html) it's free
3. tcpdump
4. strace
5. Nagios (u have to download from: www.nagios.org/download)


Hope this may help u !

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@ PrabhuVairak provided the link, the SW is not free, when I tried to download it indicates for 30 days trial version. Would u like to mention here what OS u r using ! Because, SW are different for various OS. And hope, u know it very well....
And also Carlosdl provided a very good link here! u have to look it also !
Thanks
RECHIL-------
Last Wiki Answer Submitted:  Nov 24, 2010  4:28 AM (GMT)  by  Rechil   20,980 pts.
Latest Answer Wiki Contributors:  PrabhuVairakkannu   0 pts., MelanieYarbrough   6,300 pts.
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I have used Nagios, which is a practical network monitoring system. If you are using a Debian-based distribution, then check this link:

 10 pts.

 

There are couple

1. Solarwind / Orion
2. Nagios
3. Op Manager
4. Tivoli

 12,100 pts.

 
 60,255 pts.