Tcpview.exe updates every second, as its default, but the user can customize the rate using the Options|Refresh Rate. It also downloads Tcpvcon, which is a command-line version with the same functionality. New endpoints are shown in color green and those that are deleted are highlighted in red. Endpoints are highlighted in yellow when the state from one update to the next are changed. It is a Windows program that reports the name of the process that owns the endpoint and resolve all IP addresses to their domain name versions. Probably not for everyone, I would rate this utility as valuable for Network engineers and ÜberGeek's and people with intermittent freezes.The file tcpview.exe is used in showing detailed listing of all TCP and UDP endpoints on the computer system that includes the local and the remote address and state of TCP connections. I love how Microsoft bought up Process Explorer and now this utility, so you know they are both pretty good tools and often useful. But I don't recommend this if you are a casual user who will not do the manual checks on a consistent schedule. I prefer to disable much of this auto-updating and even disable the checks for an update on most of my software, so I am in total control of when the internet is accessed and utilized by my software. And of course your Anti-virus and Windows Updates also do this. Adobe and Java love to go out and download updates and bring the computer to a stall. Is your machine freeze caused by the tons of software that attempt to autoupdate? This utility can be used to watch the internet accesses.
You can also save the entire list to a text file, and alter the speed at which the list refreshes. If there's a lot of activity on your system, you can filter the list. If a particular program-or perhaps malevolent bit of spyware-is streaming data from your system, you'll be able to see it, and, with the handy context menus, either close the connection or end the process. The list auto-updates as connections are created or destroyed, so you can see your network activity in real-time. this can tell you exactly what programs are using those open ports. Ever notice the lights on your modem flashing even though you are not browsing or downloading?.
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