should we require a dedicated server in a hosting company.What is a dedicated server?

for compilation of related company web sites, that may develop a considerable amount of traffic, a dedicated server is usually needed.

In the web hosting industry, a dedicated server is usually defined as the rental and exclusive use of a computer that includes a web server, related software, and connection to the Internet, located on-site, within a web hosting company’s premises.

A single computer on a web hosting network that is leased or rented, and dedicated to just one customer, comprises a dedicated server.Dedicated servers are usually used for web sites that have grown beyond the basic standard web hosting account, and require a more comprehensive network. They are also used by larger companies that need separate systems for mail, web, and database servers. Web hosting companies may have their sites spread over one or several servers. Dedicated servers are generally kept inside of data centers, so that they may be monitored by service providers.

what are the requirements of a dedicated server?What hardwares or softwares do we need to establish a dedicated server?

Well the operating system on the single computer you want to make a dedicated server should posses three factors.
We must look for the price and availability of operating system to make a dedicated server.Microsoft uses additional license fees which can increase the monthly cost of dedicated servers.Linux also has its various versions for hosting services.Operating system support may include updates to the core system in order to acquire the latest security fixes, patches, and system-wide vulnerability resolutions.

Bandwidth and Connectivity
Bandwidth is the data transfer rate or the amount of data that can be carried from one point, usually within a second, often represented in bits (of data) per second (bps).