The basic concepts of computing networks
Electronic computer network (or computer network) – a joint operation of several individual computers to a single data channel.
The main purpose of the computer network is to share resources and the implementation of rapid communication, both within the organization and beyond.
The basic concepts that are used in computer networks.
Client - a computer connected to the network.
Server (server) – A computer that provides its customers with network resources. The following types of servers:
- file server is designed to store and files that you are working;
- database server provides access to shared customers databases;
- application server is used to provide users with applications;
- The print server provides printing on common printing device from all workstations;
- Web-server provides information via the Internet;
- mail server circulates e-mail both internally and externally.
Wednesday - a way to connect computers.
Resources - drives, files, printers, modems, and other items used in a network.
Depending on the size of all electronic computing network is divided into:
- Local area networks (LANs), subscribers are concentrated at 10 – 15 km. These networks connect computers located inside a building or in several adjacent buildings.
- Regional networks , subscribers are concentrated at a distance of 10 – 100 km. These networks include the district, city and regional networks.
- Global networks , focusing on a distance of 1000 km or more. These networks include the networks of cities, regions, areas of the country. The most prominent among them – Internet, Fido, Sprint, Relcom.
In many organizations that operate personal computers, local area networks are created. This is because the LAN provides a number of significant advantages over the use of individual computers. Consider these benefits.
Resource Sharing - allows the economical use of resources in an information system. For example, to print from all computers on one printer, use one DVD drive, etc.
Sharing data - allows access to different jobs to the files that are located on other computers. While sharing the data, you can organize multiple users to create a common document.
The separation of software - allows users to use the software running on other computers.