What is the primary function of an SSL certificate?

The primary function of an SSL certificate is to establish a secure encrypted connection between a web server and a browser. SSL, which stands for Secure Sockets Layer, facilitates the secure transmission of data over the internet by encrypting the information exchanged between the user's browser and the web server. This encryption helps protect sensitive data, such as login credentials and payment details, from being intercepted by malicious actors. By using an SSL certificate, a website can enhance trust with its users, as the presence of encryption is typically indicated through HTTPS in the URL and a padlock icon in the browser's address bar.

Other options serve different purposes that are not directly related to the primary function of an SSL certificate. For instance, improving website loading speed involves performance optimization techniques rather than security. Backing up website data pertains to data management rather than data protection. Managing domain name registrations is a function of domain registrars and does not relate to the secure transmission of information between web servers and browsers. Therefore, the role of an SSL certificate in creating an encrypted connection is crucial for ensuring data confidentiality and integrity during online transactions.