What is the annular network?

Ring Network is a network of two or more network devices connected physically or logically, one by one, making the device string, while the last device in the string connects back to the first device. Ringové sítě jsou obvykle navrženy jako topologie s jedním prstencem nebo duálním kruhem. Vyvíjely se také vícezrňové technologie zahrnující dva nebo více paralelních prstenů. The term "physical topology" describes the way the device is physically connected together, so the topology of the physical rings has the device physically connected together and creates a ring. Pohled logické topologie se týká toho, jak informace teče. In a logical perspective, the Ring Network topology can have the device physically connected together as a bus net, a network of stars, network or tree network, but the information flows from the device to the device as if it were connected in the physical circle.prstencová síť.

Jednou z hlavních nevýhod jedné prstencové sítě je to, že zlom kdekoli v kruhu může způsobit celkové selhání toku informací. To avoid disturbing this nature, a second parallel ring or track can be added against compliance with the valuation that sends information in the opposite direction. Tento typ redundantní sítě se nazývá sítí s dvojitou kruhou. If one of the rings in a double circle network suffers damage, information can still achieve all devices using an undamaged alternative path.

The second disadvantage of the ring networks is that the information travels more slowly because the data must pass through every device when it takes place through the network. Despite this restriction, the topology of the rings are still used in network fiber optics, such as networks for distributed data interface (FDDI), synchronous optical networks (Sonnet) and SNH synchronous networks (SDH). TOThese high -speed networks include the physical topology of dual ring, and it also benefits from redundancy provided by this type of topology.

Ring Networks became popular for the first time at the age of 80, when the topology of logical rings were used in token rings technologies. The limitation associated with the ring network, along with problems with compatibility between the token ring and other protocols, led to the fact that the token ring technologies were largely replaced by newer data transport methods such as Ethernet. Although Ethernet continued to deal with protocols used with networks from optical fiber rings, the use of high speeds for transporting high speed data continued.