CREST Practitioner Security Analyst (CPSA) 2026 – 400 Free Practice Questions to Pass the Exam

Port 500 is associated with the Internet Key Exchange (IKE) protocol, which is used primarily to establish secure communication channels in Internet Protocol Security (IPsec) by negotiating authentication and the encryption keys. This is critical for creating secure VPN connections.

In the context of security and network communications, IKE facilitates the automatic establishment of security associations, enabling devices to communicate securely. Since IKE operates on port 500, it is vital for professionals in cybersecurity to recognize this association, as it plays a significant role in the encryption and integrity of data being communicated over potentially insecure networks.

The other choices do not relate to port 500, as they pertain to different protocols or legislative acts unrelated to the port number in question. Understanding that port assignments are standardized, as given by the Internet Assigned Numbers Authority (IANA), helps in recognizing and deploying services effectively while also securing networks.