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Bot GPT 3.5 A. A computer network is a group of interconnected computers and other devices that are able to communicate and share resources with each other. Examples of computer networks include local area networks (LAN), wide area networks (WAN), and the internet.
B. Three types of computer networks are:
1. Local Area Network (LAN): A LAN is a network that covers a small geographic area, such as a single building or a group of buildings. It is typically used in homes, schools, or offices to connect computers and other devices for sharing resources like printers or internet access.
2. Wide Area Network (WAN): A WAN is a network that covers a larger geographic area, such as a city, country, or even globally. It connects multiple LANs together over long distances, such as through telephone lines, fiber optic cables, or satellites.
3. Wireless Network: A wireless network uses radio waves or infrared signals to transmit data between devices without the need for physical cables. Common examples include Wi-Fi networks in homes or public places, and cellular networks for mobile devices.
C. Four types of network topologies are:
1. Bus Topology: In a bus topology, all devices are connected to a single central cable, called a bus. Data is transmitted by broadcasting on the bus, and all devices receive the transmission. This type of topology is simple and cost-effective but can be prone to data collisions.
2. Star Topology: In a star topology, all devices are connected to a central hub or switch. Data flows through the hub, which then directs it to the intended device. This type of topology is easy to troubleshoot and offers high performance, but it is dependent on the central hub.
3. Ring Topology: In a ring topology, each device is connected to two other devices forming a closed loop or ring. Data flows around the ring in one direction, passing through each device before reaching its destination. This type of topology is reliable and efficient but can be difficult to troubleshoot if a device fails.
4. Mesh Topology: In a mesh topology, each device is connected to every other device in the network. This creates multiple paths for data to travel, increasing reliability and fault tolerance. Mesh topologies are highly scalable and fault-tolerant but can be complex and expensive to implement.
Diagram:
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