What is Search Engine Optimization hosting?

[Jake]

One of the old school SEO techniques was to create your own network of sites that you could use to build backlinks to a site being promot4ed, for such sites to provide useful backlinks they must not appear to have a common owner, normally linking between 2 sites on the same server provides little search rank benefit because they share the same IP address which reveals they share the same owner.

SEO hosting may provide an account with multiple IP addresses, they must be significantly different to appear to not have common ownership the .2. in the Yahoo IP address 72.30.2.43 is the C class part of the address, 72.30.5.18 would differ enough for SEO purposes.