Translation:Is the Internet included in mass media?
It's a question about logical categories. So, the question is asking whether internet is one of the things which is included in the category of mass media.
'included' is a more accurate translation of /termasuk/, but English speakers do use "count" this way. If you wanted to say 'count' instead in Indonesian, you'd probably use /diperhitungkan/ as the verb or possibly /terhitung/.