Internet testing device?

We're seeking a small inexpensive device, like a cable tester, that will simply check for internet connectivity.  Obviously, we could use a laptop, but that can be cumbersome... We'd like a simple device that we could plug into any port on a switch, for example, and know if we're getting an internet connection... (Shall I define "internet connection" ?  Maybe if it was able to obtain an IP address... or was able to ping the source...  

Thanks...
K AAsked:
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JohnBusiness Consultant (Owner)Commented:
You can ping something on the internet and not pass much traffic (gateway issue or like) and that has happened to me numerous times.

So simple and Ping is not much of an indicator.

Laptop remains best method.
skullnobrainsCommented:
i do not think such a device exists but a mobile phone or tablet with an OTG to ethernet cable ( about 2-5 $ ), and a ping or console application installed should do the trick. just disable wifi and mobile data while testing so they don't get in the way.

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K AAuthor Commented:
Thanks, skullnobrains... a follow-up question:  So, if you turn off wi-fi, you'd be in "data" mode... so if you turn off data mode, or go into airplane mode, do you think that cable would work (given you had an app installed, or just used any old website)?
skullnobrainsCommented:
airplane mode should allow connectivity over the otg cable. "should" because actually i don't remember trying. if not, you can always disable both wifi and cellular data which will produce desired results as well : potential internet connectivity over that cable and nothing else.
K AAuthor Commented:
'preciate it... Will give it a go.
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