Computer Network & Internet complete notes Part - 1 Video Lecture | Crash Course for SSC CGL (Hindi)

Ans. A computer network is a collection of interconnected devices, such as computers, servers, switches, and routers, that are linked together to facilitate communication and data sharing between them.

Ans. The Internet is a global network of interconnected computer networks that allows devices from all around the world to communicate with each other. It provides access to a vast amount of information, services, and resources through various protocols and technologies.

Ans. A LAN (Local Area Network) is a network that covers a small geographical area, such as an office building or a home, and is usually owned and managed by a single organization. On the other hand, a WAN (Wide Area Network) spans a large geographical area and connects multiple LANs together, often using public or private communication links.

Ans. Switches are devices that connect multiple devices within a LAN and facilitate the transfer of data between them. They operate at the data link layer of the network and use MAC addresses to forward data to the intended recipient. Routers, on the other hand, operate at the network layer and are responsible for forwarding data between different networks. They use IP addresses to determine the best path for data transmission.

Ans. Some advantages of using a computer network include: - Resource sharing: Networks allow devices to share resources such as printers, storage devices, and internet connections, reducing costs and improving efficiency. - Communication: Networks enable seamless communication between individuals and groups through email, instant messaging, video conferencing, and other collaboration tools. - Centralized management: Networks allow for centralized management of resources, security settings, and software updates, making it easier to maintain and control the network infrastructure. - Data backup and recovery: Networks provide the ability to back up data centrally, minimizing the risk of data loss and facilitating quick recovery in case of hardware failure or disasters. - Scalability: Networks can be easily scaled up or down to accommodate the changing needs of an organization, allowing for flexible growth and expansion.