Can my Internet Service Provider (ISP) study traffic statistics to accurately determine the time of my online activity over the past few months?

Question

Computer networks

Can my ISP by studying traffic statistics accurately determine that I (or someone else who lives with me or was at my house) was active on the network (that is, established connections with any web page, sent messages on a social network or email, downloaded torrent files, etc.) for example, on August 8, 2014 from 9 hours 6 minutes 5 seconds to 9 hours 6 minutes 21 seconds or that I was not active (that is, I was just sitting at the monitor and browsing the web page) to For example, on August 12, 2014 from 8 hours 50 minutes 8 seconds to 8 hours 50 minutes 40 seconds ?

Answer 1

Easily

Answer 2

Yes, not only can, but is also obliged by law, and this issue has already been raised here several times.