Computer networks link computers and other devices to share information, resources and services. They can be built on wireless or wired connections and can be set up in many different network topologies. Networks are vital to business in the present and allow us to communicate with each other, collaborate and work effectively. They also assist with data security and access.

Computer networking is a broad subject that covers the ideation the design, structure, and maintenance of communication networks. It is a combination of electrical and computer science. engineering.

The Internet is the most renowned computer network, allowing billions of users to connect and share the same resources simultaneously. The network employs a packet switching model https://boardroomco.net/how-to-normalize-data-in-excel/ to guide data traffic over an almost unlimited number of connections and pathways. Each packet includes control information as well as information from the user. The control information contains the source and destination network address along with error detection codes and sequencing information. The payload is located in the data portion of a byte.

In a typical network, a central server stores information and controls access for users to critical resources like printers photocopiers and files. The server is secured by firewalls and multifactor authentication systems to ensure that only authorized users can access it. Centralizing information stored on servers makes it easier for administrators and network security policy enforcers, to perform regular backups. Employees can also access corporate services and applications, regardless of their location — such as video-calling software or document-sharing.