A university authorizes a wireless protocol resilience assessment on its WPA2-secured network.

The correct answer is A. Key Reinstallation Attack (KRACK).

The scenario describes retransmitting a captured WPA2 handshake message so that the client reinstalls an already negotiated key. This is the defining behavior of KRACK, or Key Reinstallation Attack.

CEH wireless material explains that KRACK is a replay-style attack against WPA2 that abuses the four-way handshake. By repeatedly replaying the third handshake message, an attacker can cause the victim to reinstall the same encryption key, which can result in reuse of cryptographic values and weakening of traffic protection .

Option B. Replay Attack is too general. KRACK uses replay behavior, but the specific wireless technique is key reinstallation.

Option C. Man-in-the-Middle Attack is also too broad because the core weakness is not merely interception but forced key reinstallation.

Option D. WPA2 PSK Offline Cracking is incorrect because the scenario does not describe capturing a handshake and cracking the pre-shared key offline.

Therefore, the best answer is A. Key Reinstallation Attack (KRACK).