Backlink - a link from some other website (the referrer) to that web resource (the referent). A web resource may be (for example) a website, web page, or web directory.Have you had a chance to answer the previous question?
Broken link ( dead or “rotten” link) is a hyperlink that is linked to an empty or non-existent webpage or file. When a broken link is clicked or requested, an error message is posted.
External Link is a type of hyperlink that points at (target) any page of the website or domain name other than the domain the link exists on (source).
An internal link is a type of hyperlink on a page to another page or resource, on the same website or domain name.