one way linking according to the word describes itself... it means that you are linking to something and that same thing is not linking to you. Like some site is linking to your site and you are not linking to that site in particular, so this will be called as one way linking. one way linking is usually used in increasing page rank and by one way linking it happens to be more effective in search engine optimization and SERPs Hope it helps...
While reciprocal link building involves exchange of links, inbound link building is a process that doesn’t involve exchange of links between two websites. Inbound links are also called one–way links. As the name suggests, one–way linking is building links for the website without reciprocating it. If Website A receives a link from any webpage of website B without having to give a link back to website B, then this link is an inbound link for website A.
one way linking is when a site links to you without you linking back to them. reciprocal linking is when you trade links with another site. One way links are much powerful because it means a certain site voted for you without asking anything in return. But then again, since links can be bought, one way links can be sometimes abused.