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Originally posted by Hal9000
It is probably a ferrite RF/EMI suppressor. It is used to reduce high frequency noise being induced into the cable. It is probably not a wiretap or anything like that.
If someone wanted to monitor what you’re doing on the Internet at work, there is software to do that. If you are curious, you could ask your employer about it. I think most companies will tell you if you are being monitored.
Originally posted by slimbob
why would something like that be snapped onto an ethernet cable?