How will you prevent canonicalization issue?

How will you prevent canonicalization issue?

Through .ht access file we can resolve canonical issues.And also for more accuracy you can choose your preferred domain in webmasters.

Generally you can use the canonical tag for the site but 301 redirect is the pretty good methods it redirect permanently.

Many webmasters don't have access to server redirect tools like Apache's .htaccess file, so they can't install conventional redirects to solve canonicalization problems. Fortunately, there is a simple alternative.

As per google webmaster guideline, a web site with www & without www is treated two individual web sites with same content. So in this case google takes one web site as a duplicate content. It affects not only your ranking also affects your web site page rank. You can solve this by using a 301 redirect to the correct URL using the rel=canonical tag.

Canonicalization nothing but the duplicate one prevention methods are try to give unique information,if duplicate present means you can using redirection methods and redirect it permanently...