CREST Practitioner Security Analyst (CPSA) Practice

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Master the CREST Practitioner Security Analyst Exam. Prepare with quizzes and comprehensive study guides that include tips and explanations. Excel in your certification journey!

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Which service uses port 29?

MSG ICP
SMTP
SSH
DNS

The correct answer is: MSG ICP

The service that uses port 29 is MSG ICP, which stands for Message Integrity Check Protocol. This protocol is utilized in various messaging applications to ensure the integrity of messages being transmitted over a network. It plays a crucial role in verifying that messages have not been altered during transit, thereby maintaining the integrity and reliability of communications. In contrast, the other options represent widely known services tied to different ports. SMTP, for instance, is known for using port 25 for sending emails, SSH uses port 22 to enable secure remote logins, and DNS operates primarily over port 53 to resolve domain names to IP addresses. Each of these services plays critical roles in networking and communication, but they do not relate to port 29. Recognizing that MSG ICP is specifically associated with port 29 helps in understanding the broader context of network protocols and their designated communication ports.