Palo Alto Networks Certified Cybersecurity Entry-level Technician (PCCET)Cybersecurity FundamentalsMedium
A network administrator is configuring new firewall rules for a secure web server. The server needs to accept incoming HTTPS connections from external users while blocking all other unsolicited incoming traffic. Which well-known port number should the administrator explicitly allow for HTTPS traffic?
- APort 21
- BPort 80
- CPort 443
- DPort 3389
Show answer & explanationAnswer & explanation
Correct answer: C. Port 443
HTTPS (Hypertext Transfer Protocol Secure) uses TCP port 443 by default for encrypted web communication. Allowing this port enables secure web access while blocking others enhances security.
Why the other options are wrong
- A. Port 21 is used for FTP (File Transfer Protocol), not HTTPS.
- B. Port 80 is used for HTTP (unencrypted web traffic), not HTTPS.
- D. Port 3389 is used for RDP (Remote Desktop Protocol), not HTTPS.
Well-Known Port 443
The standard port number designated for HTTPS (Hypertext Transfer Protocol Secure) traffic, which provides encrypted communication over a computer network.
- Used by HTTPS for secure web browsing.
- Encrypts data using SSL/TLS.
- Essential for secure online transactions and data transfer.
Memory trick: 443 is secure web, 80 is old web, 21 is files, 3389 is remote control.