312-49 · Question #98
312-49 Question #98: Real Exam Question with Answer & Explanation
The correct answer is B: 10.000 packets. TKIP was introduced as part of WPA to address WEP's critical weakness of using static encryption keys. One of TKIP's core enhancements is automatic key rotation: temporal (session) keys are refreshed every 10,000 packets. This frequent rekeying drastically limits the amount of da
Question
Wi-Fi Protected Access (WPA) is a data encryption method for WLANs based on 802.11 standards. Temporal Key Integrity Protocol (TKIP) enhances WEP by adding a rekeying mechanism to provide fresh encryption and integrity keys. Temporal keys are changed for every____________.
Options
- A5,000 packets
- B10.000 packets
- C15,000 packets
- D20.000 packets
Explanation
TKIP was introduced as part of WPA to address WEP's critical weakness of using static encryption keys. One of TKIP's core enhancements is automatic key rotation: temporal (session) keys are refreshed every 10,000 packets. This frequent rekeying drastically limits the amount of data an attacker can capture under a single key, making cryptographic attacks like the FMS attack (used against WEP) impractical. Even if an attacker begins to crack a key, it will have already been rotated before enough packets are captured. The other options (5,000 / 15,000 / 20,000) do not match the defined TKIP specification.
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