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A computer network is a group of computers that are connected to each other for the purpose of communication.

File Sharing resource Sharing Increased Storage Capacity Increased Cost Efficiency

One of the intended aspects of wireless grids is that it will facilitate the sharing of a wide variety of resources. These will include both technical as information resources. The former being bandwidth, QoS, and web services, but also computational power and data storage capacity. Information resources can include virtually any kind of data from databases and membership lists to pictures and directories.

One of the most important parts of any PC is the hard disk. When you buy a new computer it always seems so large. The capacity appears so much that you can’t imagine filling it up. Over time though files get larger you save more and more work to it and the next thing you know you PC is slowing down to a crawl and you keep getting warnings about the disk being full. The good news however, is that upgrading a hard disk is a fairly simple operation if you have a desktop PC, its a little harder in laptops but it’s still possible. Increased Storage Capacity to a computer is to replace a hard disk onto the CPU.

Is to leverage the return on investment on computers by making more productive the people that are using them. Another cost efficiency is in large computer life time by increasing storage and ram.

LAN WAN MAN WLAN SAN

is a computer network covering a small physical area, like a home, office, or small group of buildings, such as a school, or an airport. The defining characteristics of LANs, in contrast to wide-area networks (WANs), include their usually higher data-transfer rates, smaller geographic area, and lack of a need for leased telecommunication lines.

is a computer network that covers a broad area (any network whose communications links cross metropolitan, regional, or national boundaries). This is in contrast with personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (a city) respectively.

is a large computer network that usually spans a city or a large campus. A MAN usually interconnects a number of local area networks (LANs) using a high- capacity backbone technology, such as fiber-optical links, and provides up-link services to wide area networks and the Internet.

links devices via a wireless distribution method (typically spread-spectrum or OFDM radio), and usually provides a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network.

is an architecture to attach remote computer storage devices (such as disk arrays, tape libraries, and optical jukeboxes) to servers in such a way that the devices appear as locally attached to the operating system. A SAN typically is its own network of storage devices that are generally not accessible through the regular network by regular devices. The cost and complexity of SANs has dropped in recent years, resulting in much wider adoption across both enterprise and small to medium sized business environments. A SAN alone does not provide the "file" abstraction, only block-level operations. However, file systems built on top of SANs do provide this abstraction, and are known as SAN file systems or shared disk file systems.