Search results
Results From The WOW.Com Content Network
"Token Ring is an example of a ring topology." 802.5 (Token Ring) networks do not use a ring topology at layer 1. Token Ring networks are technologies developed by IBM typically used in local area networks. Token Ring (802.5) networks imitate a ring at layer 2 but use a physical star at layer 1. "Rings prevent collisions." The term "ring" only ...
Date/Time Thumbnail Dimensions User Comment; current: 18:46, 23 July 2009: 900 × 420 (91 KB): SCH56 == Summary == {{Information |Description={{en|1=Diagram illustrating the interconnection and data flow in a SERCOS III industrial control interface network in ring configuration.}} |Source=Own work by uploader |Author=SCH56 |Date=2009-07-23
A network's logical topology is not necessarily the same as its physical topology. For example, the original twisted pair Ethernet using repeater hubs was a logical bus topology carried on a physical star topology. Token Ring is a logical ring topology, but is wired as a physical star from the media access unit.
A ring link is bounded by two adjacent Ethernet Ring Nodes, and a port for a ring link is called a ring port. The minimum number of Ethernet Ring Nodes in an Ethernet Ring is three. [1] The fundamentals of this ring protection switching architecture are: The principle of loop avoidance.
Token Ring is a physical and data link layer computer networking technology used to build local area networks. It was introduced by IBM in 1984, and standardized in 1989 as IEEE 802.5. It uses a special three-byte frame called a token that is passed around a logical ring of workstations or servers.
The transmission medium used is optical fiber. The data rates supported are 2 and 4 Mbit/s, and cyclic update rates as low as 62.5 microseconds. A ring topology is used. Sercos I also supports a "Service Channel" which allows asynchronous communication with slaves for less time-critical data. [4] Sercos II was introduced in 1999. It expanded ...
During normal operation, the network works in the Ring-Closed status (Figure 1). In this status, one of the MRM ring ports is blocked, while the other is forwarding. Conversely, both ring ports of all MRCs are forwarding. Loops are avoided because the physical ring topology is reduced to a logical line topology.
An example of this situation is the adele ring of a global field; its unit group, called the idele group, is not a topological group in the subspace topology. If inversion on R × {\displaystyle R^{\times }} is continuous in the subspace topology of R {\displaystyle R} then these two topologies on R × {\displaystyle R^{\times }} are the same.