Cyberpunk futuristic, IPSEC architecture, intricate network diagram, glowing blue lines, neon lights, 3D circuit board, motherboard, CPU, encryption algorithms, secure data transmission, tunnel mode, transport mode, AH header, ESP header, IKEv2 protocol, cryptographic keys, digital certificates, security gateway, firewall, router, network interface, abstract futuristic background, high-tech ambiance, detailed metallic texture, ambient occlusion, cinematic lighting, wide-angle shot.