Computer Network Basics Questions Long
The purpose of a network hub in a computer network is to serve as a central connection point for multiple devices within a local area network (LAN). It acts as a common point where devices can connect and communicate with each other.
The main function of a network hub is to receive incoming data packets from one device and then broadcast them to all other devices connected to the hub. This process is known as broadcasting or flooding. Unlike a switch or a router, a hub does not have the capability to analyze or filter the data packets based on their destination addresses. Instead, it simply forwards the packets to all connected devices, regardless of whether they are the intended recipients or not.
The primary advantage of using a network hub is its simplicity and low cost. Hubs are relatively inexpensive compared to switches or routers, making them a cost-effective solution for small networks. Additionally, they are easy to install and require minimal configuration.
However, there are some limitations to using a network hub. Since all data packets are broadcasted to all devices, it can lead to network congestion and reduced performance, especially in larger networks with heavy traffic. Additionally, hubs operate at the physical layer of the OSI model, which means they cannot differentiate between different types of network protocols or prioritize certain types of traffic.
In modern computer networks, network hubs have largely been replaced by network switches. Switches offer improved performance and efficiency by selectively forwarding data packets only to the intended recipients, reducing network congestion and improving overall network speed. However, hubs may still be used in certain scenarios where simplicity and cost-effectiveness are prioritized over performance, such as in small home networks or temporary setups.