Computer networks connect computers and other devices to share resources, information, and services. They can be wired or wireless and configured in various network topologies. Nowadays, networks are essential for business. They allow us to communicate more efficiently, collaborate with other people and work more efficiently. They also assist with access to data and security.
Computer networking is an extensive field that covers the creation, maintenance, and architecture of communication networks. It is a blend of electrical engineering and telecommunications.
The most famous computer network is the Internet which allows millions of users to connect and utilize the same resources at the same time. The network employs a packet switching model to route data traffic over an almost unlimited number of connections and pathways. Each packet includes control information and information from the user. The control information contains address of the network that is used to connect to the source and destination as well as error detection codes and sequencing information. The data part of a packet includes the payload.
In a typical business network there is an central server that holds data and manages user access to crucial resources such as photocopiers, printers, and files. The server is protected by firewalls and a multifactor authentication to ensure that only authorized users can access the network. The fact that all information is centralized on servers also helps administrators to perform regular backups of their data, and to enforce strict security guidelines for the network. Additionally, it permits employees to access corporate apps and services regardless of location — for example, video-calling and document-sharing software.