Question at position 24 Before entering credit card or other sensitive data on a web page, you should make sure it is using the ________ protocol.httphttpssftpftp单项选择题
A
http
B
https
C
sftp
D
ftp

Question

Question at position 24 Before entering credit card or other sensitive data on a web page, you should make sure it is using the ________ protocol.httphttpssftpftp

BlackTom AI · Accepted Answer

HTTPS (Hypertext Transfer Protocol Secure) uses TLS/SSL to encrypt data between your browser and the web server, so it is the correct protocol for protecting credit card or other sensitive information.

1) Relevant knowledge points and concepts
- HTTP vs HTTPS: HTTP (port 80) sends data in plaintext; HTTPS (port 443) wraps HTTP in TLS/SSL to provide encryption, integrity, and server authentication.  
- Encryption and confidentiality: TLS prevents eavesdroppers from reading data in transit.  
- Certificate and authentication: HTTPS uses digital certificates so browsers can verify the server’s identity and detect man-in-the-middle attacks.  
- Other protocols listed (FTP, SFTP) are file-transfer protocols, not intended for secure web form submissions.

2) Step-by-step reasoning
- Step 1: Identify the task—submitting sensitive data on a web page requires confidentiality and integrity of the transmitted data.  
- Step 2: Determine which protocol provides these properties for web pages. HTTPS provides TLS encryption and certificate-based authentication; HTTP does not.  
- Step 3: Compare listed options: http, https, sftp, ftp. Only HTTPS is the secure web protocol designed for web pages.

3) (No numeric calculations are required; logical steps above serve as intermediate steps.)

4) Why HTTPS is correct
- HTTPS encrypts the HTTP payload with TLS so attackers cannot read or tamper with credit card numbers. Browsers show a padlock and allow users to inspect the certificate, confirming a secure, authenticated connection.

5) Why the other options are incorrect
- HTTP: Unencrypted; data can be intercepted.  
- FTP: File Transfer Protocol for moving files; generally unencrypted (unless FTPS), not used for submitting web forms.  
- SFTP: SSH File Transfer Protocol, used to securely transfer files over SSH, not for loading web pages or submitting browser form data.

6) Conclusion
Because HTTPS provides encryption and server authentication specifically for web pages, the correct answer is "https", which matches the provided answer.

Question at position 24 Before entering credit card or other sensitive data on a web page, you should make sure it is using the ________ protocol.httphttpssftpftp单项选择题

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