Computer networks connect computers and other devices to share resources, information and services. They can be wireless or wired and configured in different network topologies. Networks are essential for business today, and help us communicate with each other, collaborate and work effectively. They also aid in access to data and security.
Computer networking is an extensive field that covers the creation and maintenance of communication networks. It is a mix of electrical and computer science. engineering.
The Internet is the most famous computer network with billions of users to connect and share the same resources at the same time. The network uses a packet switching model to channel data traffic through a near infinite number of paths and connections. Each packet contains control information as well as information from the user. The control information comprises source and destination network addresses errors detection codes, as well as sequencing information. The payload is the data portion of a byte.
In a typical business network there is central server that stores data and manages user access to crucial resources such as printers, files and photocopiers. The server is protected with firewalls and multifactor authentication systems to ensure that only authorized network users are able to access it. All the data is centralized on servers helps administrators to manage regular backups of their data, and to enforce strict security guidelines for the network. Additionally, it lets employees to access corporate apps and services regardless of their location, for instance, video-calling and document-sharing software.