Computer networks connect computers and other devices to share resources, information and services. They can be built on wireless or wired connections, and can be configured in different network topologies. Networks are crucial for business today. They allow us to communicate, collaborate and work more effectively. They also assist with data security and accessibility.
Computer networking is a vast field that covers the creation, maintenance, and architecture of communication networks. It is a combination of computer science, electrical engineering and telecommunications.
The Internet is the most well-known computer network with billions of users to connect and share the same resources at the same time. The network employs a switching model to guide data traffic over an almost unlimited number of possible connections and pathways. Each packet contains control information and user information. The control information contains source and destination network addresses as well as error detection codes and sequencing information. The data portion of a package contains the payload.
In the typical business network there is a central server that stores information and controls access to vital resources such as printers, files and photocopiers. The server is protected with firewalls and multifactor authentication systems to ensure that only authorized users of the network can access it. The centralization of information stored on servers makes it find this easier for administrators and network security policy enforcers to carry out regular backups. It also lets employees access corporate services and applications regardless of where they reside for example, video-calling software as well as document-sharing.