Timestamps and sequence numbers act as countermeasures against which of the following types of attacks?

The correct answer is D. Replay. A replay attack occurs when an attacker captures a valid data transmission (such as an authentication token or signed message) and retransmits it later to gain unauthorized access or repeat a transaction. Timestamps limit the validity window of a transmission (e.g., only accept p

Threats, vulnerabilities, and mitigations

Question

Options

ASmurf
BDoS
CVishing
DReplay

How the community answered

(25 responses)

B
8% (2)
C
4% (1)
D
88% (22)

Explanation

A replay attack occurs when an attacker captures a valid data transmission (such as an authentication token or signed message) and retransmits it later to gain unauthorized access or repeat a transaction. Timestamps limit the validity window of a transmission (e.g., only accept packets within 5 minutes of the timestamp), and sequence numbers ensure each packet is unique and in order, making replayed packets detectable as duplicates or out-of-range. A Smurf attack (A) is a DDoS amplification attack using ICMP. A generic DoS (B) overwhelms resources. Vishing (C) is voice-based phishing. Neither timestamps nor sequence numbers mitigate those three attack types.

Topics

#replay attack#timestamps#sequence numbers#countermeasures

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