Your question is Line-Speed Encryption Across Nodes. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Explain how you would implement line-speed encryption for data moving across high-performance compute nodes.
Cover the encryption boundary, protocol and cipher selection, hardware or NIC offload, key establishment and rotation, and the effects on RDMA throughput and latency. Explain how you would verify line-rate performance, detect failures or downgrade attempts, and decide whether the design should fail open or fail closed.