220-801 · Question #241
Which of the following ports is associated with HTTPS?
The correct answer is C. 443. HTTPS (Hypertext Transfer Protocol Secure) uses TCP port 443, which is the globally standardized port for TLS-encrypted web traffic.
Question
Which of the following ports is associated with HTTPS?
Options
- A53
- B80
- C443
- D3389
How the community answered
(46 responses)- A2% (1)
- B4% (2)
- C93% (43)
Why each option
HTTPS (Hypertext Transfer Protocol Secure) uses TCP port 443, which is the globally standardized port for TLS-encrypted web traffic.
Port 53 is assigned to DNS (Domain Name System), which resolves hostnames to IP addresses and operates over both UDP and TCP.
Port 80 is assigned to plain unencrypted HTTP, which HTTPS replaces by adding TLS encryption on the separate port 443.
Port 443 is the well-known port assigned by IANA for HTTPS. When a browser connects to a website using HTTPS, it initiates a TLS handshake on port 443 to establish an encrypted session before any HTTP data is exchanged. This port must be open in firewalls for secure web browsing to function.
Port 3389 is assigned to RDP (Remote Desktop Protocol), used for graphical remote desktop access to Windows systems.
Concept tested: HTTPS well-known port number 443
Source: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
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