Advanced CDSS subscriptions offer enhanced threat prevention capabilities: A . To improve firewall throughput by inspecting hashes of advanced packet headers: While some security features use hashing, this is not the primary advantage of advanced CDSS. B . To download and install new threat-related signature databases in real-time: Both standard and advanced CDSS subscriptions receive regular threat updates. C . To use cloud-scale machine learning inline for detection of highly evasive and zero-day threats: This is a key differentiator of advanced CDSS. It leverages cloud-based machine learning to detect sophisticated threats that traditional signature-based methods might miss. D . To use external dynamic lists for blocking known malicious threat sources and destinations: Both standard and advanced CDSS can use external dynamic lists. Reference: Information about the specific features of advanced CDSS, such as inline machine learning, can be found on the Palo Alto Networks website and in datasheets comparing different CDSS subscription levels.