Arbor Networks released its 8th Annual Worldwide Infrastructure Security Report (WISR) offering a rare view into the most critical security challenges facing today’s network operators. Based on survey data provided by network operators from around the world, this annual report is designed to help network operators make more informed decisions about their security strategies as they relate to the integrity of mission-critical Internet and other IP-based infrastructure. The increase in botted hosts is not surprising given the number and complexity of malware variants that exist, their rate of evolution and the consequent inability of Intrusion Detection Systems (IDS) and Anti-Virus (AV) systems to fully protect them.