While inspecting a company's new web portal, a technician needs to verify that any credentials submitted by users are protected from eavesdropping during transit. The technician confirms that the browser is communicating over TCP port 443. Which application-layer protocol running on that port ensures the session is encrypted end-to-end?
SSH
HTTPS
SMTP
HTTP
HTTPS (HTTP over TLS) uses TCP port 443 and encrypts the entire HTTP conversation with TLS, preventing attackers from reading or altering data in transit. SSH secures remote terminal sessions on port 22, HTTP sends data in clear text on port 80, and SMTP is used for email delivery on port 25, so none of those options protect a web session's data.
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