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Computer networks link computers and other devices together to share information, resources and services. They can be wired or wireless and configured in different network topologies. Nowadays, networks are essential to the business. They allow us to communicate more efficiently, collaborate with others and perform more efficiently. They also aid in access to data and security.
Computer networking is a broad subject which covers the design of architecture, design, and maintenance of communication networks. It is a blend of electrical engineering and telecommunications.
The Internet is the most famous computer network with billions of users to connect and share resources simultaneously. The network employs a packet switching model to guide data traffic through an almost infinite number of connections and pathways. Each packet contains control information as well user information. The control information contains the source and destination network address as well as error detection codes and sequencing information. The data part of a packet is the payload.
In a typical business network, there is an central server that holds data and manages user access to vital resources such as photocopiers, printers, files and printers. The server is protected with firewalls and multifactor authentication systems to ensure that only authorized network users can access it. Keeping all the information centralized on servers makes it easier for administrators to manage regular backups of 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.