Correct Answer: The linked-to domain has a link somewhere that points at the linking domain (each domain link to pages on the other's site) The right answer is "a link from the domain being linked to pointing at the linking site already exists (each domain link to pages on the other's site)." This is because despite the fact that these links are technically "reciprocal," they don't fit any pattern of penalization for such links (such as being listed on link list style pages). The search engines are least likely to devalue these because of all the natural patterns in which such linking occurs (blogrolls, news sites, forums, hobbyists, schools, etc.) does it mean,is reciprocal link good?
google has become very sharp for link marketing. in my opinion, link exchanges will not effect pr or serp