Which standardized TCP port is used by HTTPS services?

The correct answer is D. 443. Port 443 is the standardized port for HTTPS (HTTP Secure) - the encrypted version of HTTP that uses TLS/SSL to secure web traffic, officially assigned by IANA for this purpose. The distractors represent other well-known ports: 25 is SMTP (email sending), 80 is plain HTTP…

Networking Fundamentals

Question

Which standardized TCP port is used by HTTPS services?

Options

A25
B80
C8080
D443
E636

How the community answered

(22 responses)

A
5% (1)
C
9% (2)
D
77% (17)
E
9% (2)

Explanation

Port 443 is the standardized port for HTTPS (HTTP Secure) - the encrypted version of HTTP that uses TLS/SSL to secure web traffic, officially assigned by IANA for this purpose.

The distractors represent other well-known ports: 25 is SMTP (email sending), 80 is plain HTTP (unencrypted web traffic), 8080 is a common alternative/development HTTP port (not standardized for production), and 636 is LDAPS (LDAP over SSL - directory services).

Memory tip: Think "4-4-3 = secure" - 443 has one more digit than 80 (plain HTTP), just like HTTPS adds one layer (TLS) on top of HTTP. Or: HTTPS = HTTP + Security, and 443 = 80 + 363... but simpler - just remember the pair: 80 = HTTP, 443 = HTTPS.

Topics

#HTTPS#TCP ports#Network services#Port 443

Community Discussion

No community discussion yet for this question.

Full 102-500 Practice