Final answer:
The IETF (Internet Engineering Task Force) is the standard body that deals with the evolution of Internet architecture and operates by taking Requests for Comments (RFCs).
Step-by-step explanation:
The standard body concerned with the evolution of Internet architecture and the smooth operation of the Internet that also takes Requests for Comments (RFCs) is the Internet Engineering Task Force (IETF). The IETF is an open international community of network designers, operators, vendors, and researchers concerned with the Internet architecture and the smooth operation of the Internet. It is well known for developing and promoting voluntary Internet standards, particularly the standards that comprise the Internet protocol suite (TCP/IP). Members of the IETF, who come from various interested organizations, work on documents that influence the way people design, use, and manage the Internet, including the RFCs.