The REST API is a widely used standard for communications of web-based services between clients and the servers hosting them. Which protocol does the REST API depend on? 

Answer options:

A. HTTP
B. SSH
C. SAML
D. XML

A

Representational State Transfer (REST) is a software architectural scheme that applies the components, connectors, and data conduits for many web applications used on the Internet. It uses and relies on the HTTP protocol and supports a variety of data formats. Extensible Markup Language (XML) and Security Assertion Markup Language (SAML) are both standards for exchanging encoded data between two parties, with XML being for more general use and SAML focused on authentication and authorization data. Secure Shell client (SSH) is a secure method for allowing remote login to systems over a network.