Yes, many web sites try to keep track of the physical devices from which you connect to them. This could be nefarious, but much more likely the site has very good security reasons to do it…. Yes, many web sites try to keep track of the physical devices from which you connect to them. This could be nefarious, but much more likely the site has very good security reasons to do it.

Read more http://www.zdnet.com/device-tracking-by-web-sites-can-be-a-good-thing-7000021904/