Cogent Communications (CCOI) shares soared 9.1% in the last trading session to close at $64.18. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 8.1% gain over the past four weeks.Cogent is benefiting from increasing customer engagement in its Net-centric business. The company operates a large number of data centers and its extensive coverage enables it to serve Net-centric customers with a reliable and low-latency network. Additi ...