100-150 Question 50
Select 3A company's IT team is troubleshooting an issue where users cannot access a web application hosted on a server. The team confirms that the server is online, but the application is unreachable. Which of the following protocols should the team check to ensure proper operation of the web application?
- A
HTTP
- B
DNS
- C
SMTP
- D
FTP
- E
HTTPS
Show answer and explanation
Correct answers: A, B, E
Explanation
To access a web application, the HTTP or HTTPS protocols must be operational to facilitate communication between the client and server. Additionally, DNS is critical to resolve the application's domain name to its IP address. SMTP and FTP are unrelated to web application functionality, which makes them incorrect in this context.
- A. Correct.
HTTP (Hypertext Transfer Protocol) is the foundational protocol used for web applications to transfer data between the client (browser) and the server. If HTTP is not functioning properly, the web application will be inaccessible.
- B. Correct.
DNS (Domain Name System) translates domain names into IP addresses. If DNS is not working, users will not be able to resolve the web application's domain name to its corresponding IP address.
- C. Incorrect.
SMTP (Simple Mail Transfer Protocol) is used for email communication, not web applications. It is not relevant to this scenario.
- D. Incorrect.
FTP (File Transfer Protocol) is primarily used for transferring files between systems and is unrelated to web application operations.
- E. Correct.
HTTPS (HTTP Secure) is the secure version of HTTP and is often used by web applications to ensure encrypted communication. If HTTPS is not functioning properly, secure web applications may be inaccessible.