(plural ring topologies) (computing) A network topology in which, in the physical case, every node of a network is connected to exactly two other nodes: one node designated as upstream and the other as downstream. A given node receives data from its upstream node and sends data to its downstream node.
Image copyright. The price of Brent crude oil has fallen below $50 a barrel for the first time since May 2009. It fell more than a dollar to $49.92 a barrel in early trading on Wednesday before edging back above the $50 mark. Slowing global growth and increased supply of oil and gas have pushed prices sharply lower in recent weeks.
U.S. crude CLc1 closed up $1.62, or 5.6 percent, at $30.66 a barrel. Prices extended gains in post-settlement trade after data from industry group the American Petroleum Institute showed a stockpile drop of 3.3 million barrels versus analysts' forecasts for a build of 3.9 million barrels.