CREST Practitioner Security Analyst (CPSA) Practice 2026 - Free CPSA Practice Questions and Study Guide

The designation of port 443 for HTTPS is significant because it is the standard port used for secure communication over the internet. HTTPS, which stands for HyperText Transfer Protocol Secure, utilizes SSL/TLS to encrypt the data transmitted between a web server and a browser. This encryption is crucial for ensuring privacy and security, particularly when sensitive information, such as login credentials and personal data, is involved.

Port 443 is specifically reserved for this secure communication, allowing web servers to differentiate between standard HTTP traffic, which typically uses port 80, and secure HTTPS traffic. By using port 443, web clients and servers can negotiate secure connections and utilize certificates to validate identities, thus establishing a trustworthy communication channel.

The other options do not serve the same purpose; port 80 is used for regular HTTP traffic, port 25 is designated for SMTP and email transmission, and port 202 is not commonly associated with standard web traffic or secure protocols.