200-901 Question 195
Single answerA network engineer is troubleshooting a secure web application hosted on a server. The client is unable to access the application using HTTPS. The engineer suspects an issue with the port configuration. Which protocol port value should the engineer verify to ensure HTTPS traffic is allowed?
- A
22
- B
23
- C
80
- D
443
Show answer and explanation
Correct answer: D
Explanation
HTTPS (HyperText Transfer Protocol Secure) uses port 443 by default to establish secure communication over the web. If clients are unable to access a secure application, verifying that port 443 is open and properly configured is essential. Port values like 22 (SSH), 23 (Telnet), and 80 (HTTP) are used for other purposes and do not handle HTTPS traffic.
- A. Incorrect.
Port 22 is used for SSH (Secure Shell), which is unrelated to HTTPS traffic.
- B. Incorrect.
Port 23 is used for Telnet, a protocol that does not support secure web applications.
- C. Incorrect.
Port 80 is used for HTTP (non-secure web traffic), but HTTPS requires a different port.
- D. Correct.
Port 443 is the standard port value for HTTPS, which supports secure web traffic.