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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

A security administrator needs to create a firewall rule to permit internal application servers to deliver email directly to external mail exchangers on the Internet. Which TCP destination port should be opened to allow this Simple Mail Transfer Protocol (SMTP) traffic?

  • TCP port 53

  • TCP port 25

  • TCP port 143

  • TCP port 110

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