QoS Networks, a content delivery network provider with a headquarters in Dublin, has raised $100 million in funding through an initial financing round.Funding was provided by a syndicate led by Warburg Pincus and including Sorus Private Equity, Global Crossing, Signal lake Venture Fund, Lucent Technologies and GE Capital.The company has developed a Web-based interface known as Q-access, permitting customers to change bandwidth and prioritisation in real time via a desktop.