Authority links - 4 different types and how to get them
Posted on January 19th 2008 in SEO & SEM
Wiep Knol wrote an interesting post outlining four different types of authority links. He divides authority links into absolute and relative authority links, depending on the site hosting an incoming link. Both absolute and relative authority links are further divided into informational links and navigational links.
The post then goes into link acquisition techniques and gives another seven ways to obtain links. These include link trading, columns/guest posts/interviews, link buying, request proposal links, .edu links, academic research links, links on chamber of commerce websites.
If you’re going to do link building, this post will give you a good starting point to consider before you delve into it. I thought this post was informative enough to link to it using targeted keywords as anchor text. 
