200-901 Question 194
Single answerA network engineer is troubleshooting communication issues between a client and a server. The client is using an HTTPS-based web application hosted on the server, but the connection is failing. Which protocol port value must be checked to ensure HTTPS traffic is allowed through the network firewall?
- A
22
- B
23
- C
80
- D
443
Show answer and explanation
Correct answer: D
Explanation
HTTPS (Hypertext Transfer Protocol Secure) uses port 443 for secure and encrypted web communication. When troubleshooting network issues involving HTTPS, it is crucial to ensure that port 443 is not being blocked by firewalls or other network devices. The other ports mentioned (22 for SSH, 23 for Telnet, and 80 for HTTP) are not relevant to HTTPS traffic.
- A. Incorrect.
Option 22 refers to the port number used for SSH (Secure Shell) communication, not HTTPS.
- B. Incorrect.
Option 23 is the port number for Telnet, which is used for terminal emulation and not related to HTTPS.
- C. Incorrect.
Option 80 is the port number for HTTP traffic, which is unencrypted. HTTPS uses a different port.
- D. Correct.
Option 443 is the correct port number for HTTPS traffic, which is encrypted and secure.