rengasverkoita

Rengasverkoita, or ring networks, are a type of computer network topology where devices are connected in a circular fashion. Each device in the ring network is connected to exactly two other devices, forming a single path for data transmission. Data travels in one direction around the ring, passing through each node until it reaches its destination. This unidirectional flow means that if a single cable or device fails, the entire network can be disrupted.

Historically, ring networks were popular in local area networks (LANs), particularly with technologies like Token Ring. In a Token Ring network, a special frame called a token circulates the ring. A device can only transmit data when it possesses the token, ensuring that only one device transmits at a time and collisions are avoided. This deterministic access method provided predictable performance.

However, the inherent vulnerability of a single point of failure has led to a decline in the widespread use of simple ring networks. Modern networks often favor more robust topologies like star or mesh networks, which offer better fault tolerance and easier management. While pure ring networks are less common today, the concept of a ring or a dual ring topology is still utilized in some high-speed backbone networks and metropolitan area networks (MANs) where redundancy can be built in through multiple rings.