CV0-003 · Question #224
Which of the following ports is used for HTTPS?
The correct answer is C. 443. HTTPS uses TCP port 443, the IANA-assigned well-known port for HTTP traffic encrypted over TLS/SSL.
Question
Which of the following ports is used for HTTPS?
Options
- A25
- B80
- C443
- D444
How the community answered
(55 responses)- A2% (1)
- B2% (1)
- C93% (51)
- D4% (2)
Why each option
HTTPS uses TCP port 443, the IANA-assigned well-known port for HTTP traffic encrypted over TLS/SSL.
Port 25 is assigned to SMTP (Simple Mail Transfer Protocol) for email relay between servers, not for HTTPS.
Port 80 is the standard port for unencrypted HTTP traffic and does not provide the TLS encryption that HTTPS requires.
Port 443 is the globally standardized TCP port for HTTPS, as assigned by IANA. When a client connects to a URL beginning with 'https://', it initiates a TLS handshake on port 443 before any application data is exchanged, ensuring the session is encrypted. This port must be permitted through firewalls and network devices for secure web traffic to function.
Port 444 is not an IANA-assigned well-known port for HTTPS or any other major protocol in common use.
Concept tested: HTTPS well-known port number assignment
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/service-overview-and-network-port-requirements
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