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Just read an article "after the rookie use Z-blog Play optimization---situation full record", which mentioned the change of IP on the site rankings have an impact, post comments on a lot of people say that the change of IP did not affect.
I think this is not absolute.
For IP, if it is a virtual host replacement server, such as the transfer of virtual host from Server A to new server B, then depending on the status of the server will be different results.
If the service has been a search engine K, or the server has a lot of search engine K station, then change the server after a very large may lead to the collection and ranking of the lower.
If server B has a lot of search engines included good stations, then the site to the server, the collection and ranking will have a great change.
I had this experience, put a new site on a already have a lot of high PR value (3,4,5) of the server, the new site does not use the external link Google included is very significant.
The above is said is the virtual host, then the server for IP will also encounter similar situation, if the IP transfer to a frequent cheating IP section, included will be negatively affected.
Specifically, the server's IP only affect the search engine included and ranked a factor, the impact of the ranking factor is very much, the site's collection and ranking is not necessarily the replacement of IP.
Only Web site access is very slow (especially when the number of virtual hosts on a server is too large), or the server is K, we need to change the IP.
PS: My blog change address www.east263.com write it is to leave a copyright bar.
These two days are writing "cool Shadow small what year summary, SEO overview"