General knowledge of physical computer components and architectures, including the functions of computer domains, directory services, various components and peripherals, basic programming concepts, assembly codes, TCP/IP, OSI models, underlying networking protocols (e.g., DNS, ARP, etc.), security hardware and software. The Cyber Defense Operator (CDO) supports the Air Force Computer Emergency Response Team (AFCERT) mission by providing continuous, near real-time network security monitoring, intrusion detection analysis, and host security monitoring across the Air Force Information Network (AFIN).