Repetitive links from common IP addresses

A supplemental consideration to receiving repetitive links from the same website would be receiving links from the same web server. Shared hosting accounts on web servers all share a common IP address, the numerical Internet identifier that pinpoints all websites. The IP address is like a signature—and it's a signature that search engines can follow. Search engines are wise to monitor IP addresses because link farms and content farms often share the same IP address with each other. Monitoring these IP addresses helps search engines ferret out unsavory link practices.

And so, links from the same IP address are most likely discounted by search engines. You will get credit for one link, but if multiple links originate from the same IP address, the search engines can fairly determine that the same site owner has linked more than once and the subsequent links are discounted.

The IP address of a website looks something like "111.222.333.444", four sets of...