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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

An engineer is tightening inbound network rules for an Amazon EC2 instance that will run a plain-text Internet Message Access Protocol (IMAP) service. Email clients must be able to retrieve messages over TCP without TLS, while POP3 and SMTP access remain blocked. Which single TCP port should be opened in the security group to meet these requirements?

  • TCP port 993

  • TCP port 110

  • TCP port 143

  • TCP port 25

ISC2 Systems Security Certified Practitioner (SSCP)
Network and Communication Security
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