Which of the following protocols can be used for secure data transmission in Fortinet devices?

HTTPS is an extension of HTTP that provides secure communication over a computer network by using the Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocols. It encrypts data exchanged between the client and server, ensuring that sensitive information remains confidential and secure from eavesdropping or man-in-the-middle attacks. When using Fortinet devices, HTTPS is critical for secure data transmission, especially for tasks like web management and secure access to FortiGate devices.

In contrast, ARP (Address Resolution Protocol) is used for mapping IP network addresses to the hardware addresses used by a data link protocol, but it does not provide any security features. HTTP is the standard protocol for transferring hypertext, but it transmits data in clear text, making it vulnerable to interception. ICMP (Internet Control Message Protocol) is used for network diagnostics and does not inherently support any secure data transmission; it is primarily utilized for sending error messages and operational information. This reinforces HTTPS as the correct choice for protocols facilitating secure data transmission in Fortinet devices.