220-801 · Question #784
Traffic coming across port 443 is for which of the following protocols?
The correct answer is D. HTTPS. Port 443 is the well-known port number assigned to HTTPS, the secure version of HTTP that uses TLS/SSL encryption.
Question
Traffic coming across port 443 is for which of the following protocols?
Options
- ASFTP
- BFTP
- CHTTP
- DHTTPS
How the community answered
(24 responses)- B4% (1)
- C4% (1)
- D92% (22)
Why each option
Port 443 is the well-known port number assigned to HTTPS, the secure version of HTTP that uses TLS/SSL encryption.
SFTP (SSH File Transfer Protocol) uses port 22, which is the same port as SSH, not port 443.
FTP (File Transfer Protocol) uses ports 20 (data) and 21 (control) for unencrypted file transfers.
HTTP (Hypertext Transfer Protocol) uses port 80 for unencrypted web traffic, not port 443.
HTTPS (Hypertext Transfer Protocol Secure) uses port 443 by default and encrypts web traffic using TLS to protect data in transit between a browser and a web server. This port assignment is standardized by IANA and is the foundation of secure web browsing, online transactions, and API communications.
Concept tested: Well-known port number for HTTPS
Source: https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml
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