A computer server is part of a network infrastructure. In computer science, a computer server is a piece of hardware or software which provides extra functionality to clients, usually referred to as “clients” and which provides internet connection for any number of servers, called “servers”. This architecture is known as the client/server architecture. In the world of e-commerce, it is the backbone of a wide variety of computer applications which make up an e-business environment.
The basic vps computer server consists of a central processing unit (CPU) with multiple sockets for input and output devices connected to a physical computer or a logical computer. The CPU can only execute instructions specific to the type of device which is attached to it; for example an Ethernet card attached to the CPU cannot run the operating system on its own. The execution is done by a hypervisor – a virtual-reality application program which abstracts the hardware into an illusion of a much more powerful computer. The hypervisor can be either hardware based like the hardware virtualization found in desktop environments or it can be software based like the Linux operating system.
The hardware of a computer server will vary according to its use. In small, compact server environments, the servers will tend to be very basic. Often only having four or eight computers connected to each other via a low-speed modem, these servers are good for simple single-user access or for simple file sharing and web page file management. However in a large, central office network, where many computers are connected to the server, these servers will be able to provide dedicated, secure data center space for the management of larger companies and server environments.
Many businesses use computer servers for their websites, either because they have chosen to implement their own proprietary online applications or because they need the reliability and performance of Windows servers without the licensing expense. Apache is one popular open source web server that has many similarities to its commercial counterpart, like the number of servers per physical processor. For small sites, especially those with only a few computers attached to a shared server environment, it may be all that is needed. Large, secure, commercial environments with hundreds of computers attached tend to require multiple Apache servers. For this reason, many servers use Hypertext Preprocessor (PHP) as their main language, because it allows them to be used in both browser and server environments. However PHP isn’t the only web server that is commonly used for these types of sites.
A main difference between a web server and a file server is that requests for information are sent by an HTTP request, while a file transfer protocol is generally used to communicate information between programs. While requests sent by an HTTP request are small, they can fill up a large amount of memory. File servers are not intended to take up as much memory because much of the data that they will be working on won’t be accessed for a long period of time. When combined with disk-based storage of information, file servers are often combined with server hardware that has more memory.
Computer servers can be expensive and power supplies can break down quickly if they aren’t maintained properly. Because of this, computer maintenance is done regularly at both a local and national level. Proper maintenance can ensure that servers are running at maximum capacity, while ensuring that they don’t crash or shut down unexpectedly due to hardware failure. Computer servers can also be moved from one location to another, which requires a lot of power and a lot of money, so they need to be properly maintained so that they can operate efficiently.