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dedicated

 or shared 

(co-located). Clearly, if content on a server is shared with other sites hosted on the same 

server then performance and downtime will be affected by demand loads on these other sites. 

But a dedicated server package can cost 5 to 10 times the amount of a shared plan, so many 

small and medium businesses are better advised to adopt a shared plan, but take steps to 

minimise the risks with other sites going down.

For  high-  traffic sites, servers may be located across several computers with many pro-

cessors to spread the demand load. New distributed methods of hosting content, summa-

rised by Spinrad (1999), have been introduced to improve the speed of serving web pages for 

very large corporate sites by distributing content on servers around the globe, and the most