GIAC Foundational Cybersecurity Technologies Practice Test

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Which protocol is commonly used for secure data transmission over the internet?

HTTP
FTP
SMTP
HTTPS

The correct answer is: HTTPS

The protocol commonly used for secure data transmission over the internet is HTTPS. HTTPS stands for Hypertext Transfer Protocol Secure and is an extension of HTTP, providing a secure way to transmit data between a web browser and a web server. This security is achieved through the use of Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL), which encrypts the data exchanged to protect it from eavesdropping, tampering, or man-in-the-middle attacks. HTTPS is essential for securing sensitive information, such as login credentials, payment details, and personal data, making it a fundamental aspect of online security for various applications and websites. Many online services today require HTTPS to maintain user trust and protect data integrity. In contrast, the other protocols mentioned do not provide the same level of security. HTTP (Hypertext Transfer Protocol) transmits data without encryption, making it vulnerable to interception. FTP (File Transfer Protocol) is primarily used for transferring files, but its standard implementation does not include encryption, putting data at risk during transmission. SMTP (Simple Mail Transfer Protocol) is used for email transmission but also lacks inherent security features without additional encryption methods like STARTTLS.