You have a medium-sized network, say 350 machines spread over 3 locations. You’ve suddenly, in the last week or so, noticed that your Internet connection has gotten a whole lot slower! Where would you start to look for what’s causing the bottleneck? In the last week we’ve found one machine with a trojan, gotten it off the network and cleaned up, with no real improvement in Internet speed. We’ve talked people into cutting down their use of streaming radio, etc. again with no real improvement.
My next suggestion is to start capturing traffic at the firewall, to tell us which computers are using the most bandwidth and then go from there, but I’m not the Network Admin or Network Engineer, so we’ll have to see where my suggestion goes.
I am, however, curious as to what you would do in this situation? Where do you start in order to narrow down what the problem might be? (And yes, I’m totally looking for suggestions to take to my boss at this point from networking folks who know more than me.)
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