NETáTraffic Meter uses a special driver to monitor network and internet traffic. This allows NETáTraffic Meter to gather more extensive information about the network interface and the packets that are transmitted.
This schematic displays how traffic is monitored:
The only disadvantage of this method is that, if you are running a firewall, it is possible that it displays messages that "Netmon NTáDriver (nmnt.sys)" is being contacted by a remote computer or that it sends information to a remote computer. What is in fact happening is that this driver captures the traffic (the packets) meant for a client application (InternetáExplorer, Msn, Irc,...). Then it analyses the traffic and sends it back to it's correct destination. The firewall does not know this and thinks that the traffic was send to "Netmon NTáDriver". It is possible that your firewall will ask you if you want to block traffic to or from this "Netmon NTáDriver". If you block this driver, the traffic will be bypassed direct to the client and NETáTraffic Monitor will not monitor any kind of traffic.