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Computer networks connect computers and other devices together to share resources, information and services. They can be built on wired or wireless connections, and can be configured in different network topologies. Nowadays, networks are crucial to the business. They enable us to communicate more efficiently, collaborate with others and work more efficiently. They also aid in data security and access.

Computer networking is a broad area that encompasses the concept the design, structure, and maintenance of communication networks. It is a combination of computer science and electrical engineering.

The Internet is the most famous computer network, allowing billions of users to connect and share the same resources simultaneously. The network employs a switching model to guide data traffic through an almost endless number of connections and pathways. Each packet contains both information about control and information from the user. The control information comprises source and destination network addresses as well as error detection codes and sequencing information. The payload is contained in the data part of a byte.

In a typical network, central servers store data and manages access by users to crucial resources like printers photocopiers, and files. The server is protected by firewalls and multifactor authentication systems to ensure that only authorized network users have access to it. The centralization of information on servers allows administrators and security policy enforcers, to perform regular backups. It also lets employees access corporate services and apps regardless of where they are including video-calling software and document-sharing.