Final answer:
Network attack traffic contains time series data and metadata like source and destination addresses, which are essential for analyzing and mitigating attacks, thus making options A and C correct.
Step-by-step explanation:
The question is inquiring about the types of data that network attack traffic may contain. Network attack traffic can capture a vast range of data. This includes, but is not limited to, time series data containing attack packets moving in and out of a network interface. This data is crucial as it provides information over a period of time, which can be analyzed for patterns that may indicate malicious activity such as repeated access attempts or unusual data flows.
Moreover, network attack traffic also typically contains metadata about these packets, such as the source and destination addresses of the end devices involved in the communication. Knowing the source and destination can help identify where attacks are coming from and which resources are being targeted. By collecting this data over time, it is certainly possible to have an historical record covering the last several years, though the question does not explicitly state that such historical data is a characteristic of network attack traffic.
Therefore, the best answer to the question would be 'Both A and C are correct' because network attack traffic can indeed include time series data and metadata such as source and destination addresses, which are vital for analyzing and mitigating attacks.