Computer networks link computers and other devices to share information, resources and services. They can be wired or wireless and configured in different network topologies. Nowadays, networks are crucial to business. They enable us to communicate more effectively, collaborate with others and perform more efficiently. They also aid in data security and access.
Computer networking is a broad subject which covers the design the design, structure, and maintenance of communication networks. It is a blend of computer science, electrical engineering and telecommunications.
The most famous computer network is the Internet which allows billions of people to connect and utilize the same resources simultaneously. The network uses a packet switching model to direct data traffic over an almost unlimited number of possible connections and routes. Each packet contains control information and user data. The control information includes the destination and source network address, error detection codes, and sequencing information. The payload is located in the data part of a byte.
In a typical network, a central server stores information and controls access for users to critical resources such as printers, photocopiers and files. The server is secured by firewalls and a system of multifactor authentication to ensure that only authorized users are able to access the network. The centralization of information on servers makes it easier for administrators and network security policy enforcers to perform regular backups. It also lets employees access corporate services and applications, regardless of their location including video-calling software as well as document-sharing.
