A Star network is one of the most common computer network topologies. In its simplest form, a star network consists of one central hub which acts as a conduit to transmit messages. In star topology, every host is connected to a central hub. A star network is an implementation of a spoke-hub distribution paradigm in computer networks.
The hub and hosts, and the transmission lines between them, form a graph with the topology of a star. Data on a star network passes through the hub before continuing to its destination. The hub manages and controls all functions of the network. It also acts as a repeater for the data flow.
The star topology reduces the impact of a transmission line failure by independently connecting each host to the hub. Each host may thus communicate with all others by transmitting to, and receiving from, the hub. The failure of a transmission line linking any host to the hub will result in the isolation of that host from all others, but the rest of the network will be unaffected.
The star configuration is commonly used with twisted pair cable and optical fibre cable. However, it can also be used with coaxial cable.
Video Star network
Advantages and disadvantages
- Advantages
- If one node or its connection breaks, it doesn't affect the other computers nor their connections
- Devices can be added or removed without disturbing the network
- Disadvantages
- An expensive network layout to install because of the number and length of cables needed to wire each host to the central hub
- The central hub is a single point of failure for the network
Maps Star network
References
Source of article : Wikipedia
0 Comments