The route command falls more under the configuration category. What is really great about it is it shows the throughput in both directions of each top offender. What iftop displays is the list of top connections ranked by throughput, so that you can see many of the top offenders chewing through your available bandwidth or throughput. Instead of processes though it does this for network connections. Iftop, as its name implies, does something similar to the top command. Ever wonder if that service or daemon you started such as apache is actually listening on the right ports or any ports? You can use netstat to view that kind of information to help confirm whether the ports are being listened on.
For starters it will show you connection tables, which allows you to see which outgoing connections your system is making and also which incoming connections are established. Netstat is a tool that comes with most Linux distributions and has a few use cases.
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