Which of the following types of attack signatures can be detected only after analyzing a series of packets over a long time?
A. Context-based signature
B. Composite signature
C. Content-based signature
D. Atomic signature
Answer (2)
The correct answer is B. Composite signature, as it requires analyzing multiple packets over time to detect the presence of an attack. Other signature types can identify threats based on single or immediate attributes. Composite signatures look for patterns that only emerge through long-term observation.
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To understand which type of attack signature can be detected only after analyzing a series of packets over a long time, let's break down each option:
Option A: Context-based signature - These signatures are designed to detect attacks by analyzing the context of data over a period. They consider multiple factors and packet sequences to determine if a malicious pattern exists.
Option B: Composite signature - These are advanced signatures that require a series of events or packets to be analyzed over time. They look for specific patterns across multiple packets and sessions, making them suitable for detecting complex attack methods that occur over extended periods.
Option C: Content-based signature - This type focuses on the content of individual packets, looking for specific strings or patterns that indicate malicious activity, typically requiring only a single packet for detection.
Option D: Atomic signature - These deal with individual packets or events. They are designed to detect attacks based on a single packet or event, without needing to analyze a sequence over time.
Based on this understanding, Option B: Composite signature is the correct answer, as it involves analyzing a series of packets over a longer duration to identify attack patterns that are not discernible from examining isolated packets.
