CREST Practitioner Security Analyst (CPSA) Practice

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What is the designated protocol for port 593?

RPC over HTTPS
FTP
Telnet
SMTP

The correct answer is: RPC over HTTPS

The designated protocol for port 593 is RPC over HTTPS. This protocol allows remote procedure calls (RPC) to be made over an encrypted HTTPS connection, which is crucial for secure data transmission, especially in environments where sensitive information is processed. Using RPC over HTTPS facilitates the communication between client and server while ensuring that data is encrypted during transmission. This is particularly important in enterprise environments where security measures must align with regulatory compliance and data protection standards. The alternative protocols listed—FTP, Telnet, and SMTP—serve different purposes and operate over different ports. FTP (File Transfer Protocol) is typically associated with ports 20 and 21 for file transfer, Telnet is used for remote command-line interface access on port 23, and SMTP (Simple Mail Transfer Protocol) is utilized for email transmission over port 25. None of these protocols are designed to handle the same type of secure remote procedure calls that RPC over HTTPS does, which underscores the importance of understanding the specific function and use case for each protocol designated to a particular port.