A star network is a network topology in which all devices (nodes) are connected to a central hub or switch. The central hub acts as a central point of communication, relaying data between the devices. Each device communicates directly with the hub and not with other devices in the network.
Key characteristics of a star network include:
- Central Hub: The central hub or switch is the focal point of the network. All communication between devices passes through this hub.
- Simplicity: Star networks are simple to set up and manage. Adding or removing devices generally doesn’t affect the rest of the network.
- Isolation: If one device fails, it doesn’t affect the rest of the network. Other devices can continue to operate independently.
- Performance: Since each device communicates directly with the central hub, there is no competition for network resources among devices. This can lead to consistent and predictable performance.
- Scalability: Star networks can be easily expanded by adding more devices and connecting them to the central hub. However, if the hub becomes overloaded, it can impact the entire network.
- Dependence on Central Hub: The central hub is a single point of failure. If it malfunctions or goes down, the entire network can become inaccessible.
- Wired and Wireless Options: Star networks can be implemented using wired connections (Ethernet) or wireless connections (Wi-Fi), depending on the needs of the network.
Star networks are commonly used in home networks, small businesses, and certain types of LANs (Local Area Networks). They are straightforward to set up and provide a level of control and isolation for each connected device. However, the reliance on the central hub’s functionality can be a drawback in terms of network availability and reliability.