Cogent Communications CEO to Present at Citi's 23rd Annual Global Internet, Media and Telecommunications Conference

WASHINGTON, Dec. 27, 2012 /PRNewswire/ -- Cogent Communications Group, Inc. (NASDAQ: CCOI), one of the largest Internet service providers in the world, today announced that Dave Schaeffer, Cogent's chief executive officer, will present at the Citi 23rd Annual Global Internet, Media...