Yes, it can bring traffic from both.

Traffic from the site where the back link is
and your site can start ranking in the search
engines with enough links and get more
traffic.

DK

The way you would know is if you use a stat counter. Here are a few I use:
Google analytics
Statcounter

I like the options which says "keyword analysis" to know which keywords get you the most traffic and also the "came from" where it tells you the link that traffic was sent from.

Michael

here's a good diagram of what a backlink is:


Think of your very own website as the red ball,

the yellow ones are the other websites linking or referring to your site ( your backlinks or incoming links)

The blue ones, are also websites, incoming links to the yellow ball ...

The more yellows you get, the better...and if these yellows also have blue
balls linking to them, even better...In the eyes of Google, that makes the yellow ball credible
referrals, which will ultimately result to your site being ranked among the top in Google

The higher you search engine positioning, usually means better traffic ( aim to be in Google's first page)

A backlink is essentially the same thing as an inlink. It is a link on someone else’s site that leads to your own, and it’s extremely important to garner a large number of backlinks that are reputably obtained for several reasons.

First, in SEO or search engine optimization, part of the algorithm for ranking your page on search engines is determined by the number and quality of backlinks to your site, providing they occur naturally and you have not purchased them.

Second, backlinks are how you get known on the Internet. If lots of other sites provide a link to yours, a natural increase in traffic to your web pages occurs

I hope this helps

yes u could have traffic

Cool diagram.. =) Yes, you can get traffic from both..

Quality backlinks can help your keywords rank high on SERP. If that happens traffic will come to your site.

Usually backlinks drive traffic for your website indirect. It works like this: When you make backlinks for your website from quality sites, when search engines crawl and index those websites, they find a link to your site and each backlinks can help your website to rank higher in search engines. And after a while, when your backlinks to be reached to enough number and value for competing for your desired keyword, when someone searches in search engines, your website will be appeared in top results and that searcher clicks on your website and your traffic will be increased like this.