(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.
The American benchmark was about $ a barrel. The Price of Oil What is the outlook for prices? Executives say they think it will be years before oil returns to $90 or $100 a barrel, which was pretty much the norm until the price collapse in late 2014. But after the oil price recovered from below $30 in early 2016 to over $50 by the end of the year, there was rising confidence in the industry that crude could rise to $60 a barrel or even higher later this year.