(Available in EFT Server Enterprise) EFT Server provides the option of transferring files over AS2 (Applicability Statement 2), used to exchange structured business data securely using the HTTP (Hypertext Transfer Protocol; An application protocol that runs on top of the TCP/IP suite of protocols used for Internet/intranet communications, typically over port 80.) or HTTP/S (Secure HTTP connection; HTTP is used, but with TCP port 443 and an additional encryption/authentication layer between the HTTP and TCP.) protocol. The topics below provide an overview of AS2 and describe how to configure EFT Server's AS2 module.