CompTIA A+ Core 1 (220-1201)NetworkingEasy
A technician is configuring a firewall rule to allow secure web traffic to an internal server. Which port should be opened?
- A21
- B80
- C3389
- D443
Show answer & explanationAnswer & explanation
Correct answer: D. 443
Port 443 is used for HTTPS, which encrypts web traffic using TLS/SSL. Port 80 is unencrypted HTTP, 21 is FTP, and 3389 is RDP.
Why the other options are wrong
- A. 21 is used for FTP control connections, not web traffic.
- B. 80 is unencrypted HTTP, not secure.
- C. 3389 is used for Remote Desktop Protocol.
HTTPS Port 443
Port 443 is the well-known TCP port used for HTTP Secure (HTTPS) traffic, encrypting data between client and server using TLS/SSL.
- HTTP uses port 80 (unencrypted)
- HTTPS uses port 443 (encrypted)
- TLS/SSL provides the encryption layer for HTTPS
Memory trick: '4-4-3, keep it secure like me' — HTTPS locks the door.