What does it mean to choose the verification code type?

The types of verification codes are numbers, letters, pictures and words. Please select one of them.

1, digital verification code

Digital verification code: The common ones are SMS verification code and voice verification code. Generally, the system sends a verification code message to the mobile phone number filled in by the user or recorded by the system, or dials the mobile phone number to broadcast the verification code to the customer. Such a verification code generally consists of 4-6 numbers.

2. Alphabetic verification code

Alphabetic verification code: commonly used for SMS verification and website application, among which website application is more common. The display form is to display letters in the form of pictures near the verification code input box on the page, and users can get the verification code by identifying the number of words. This verification code is generally composed of four letters, and there are also mixed combinations of letters and numbers, which are generally case-insensitive.

3. Text verification code

Text verification code: commonly used in website applications. The display form is similar to the letter verification code. The text is displayed in the form of a picture near the verification code input box, and the user can obtain the verification code by recognizing the text in the picture. This verification code generally consists of four characters (Chinese characters).

4. Picture verification code

Picture verification code: common in website applications. The presentation form is to choose the correct picture according to the page prompts. For example, the website of 12306 will display 8 pictures in the picture area, and the system will prompt a noun, such as cactus. Users need to display all pictures containing cactus according to the system requirements, and they can't choose wrong pictures or miss them.