name: SFTP
full_form: Secure File Transfer Protocol
context: For the purposes of the present document, the following terms and definitions apply: Elementary Procedure: SABP consists of Elementary Procedures (EPs). An Elementary Procedure is a unit of interaction between the CN (CBC) and the RNC. These EPs are defined separately and are intended to be used to build up complete sequences in a flexible manner. If the independence between some EPs is restricted, it is described under the relevant EP description. Unless otherwise stated by the restrictions, the EPs may be invoked independently of each other as stand alone procedures, which can be active in parallel. Examples on using several SABP EPs together with each other and EPs from other interfaces can be found in reference TR 25.931 [4]. An EP consists of an initiating message and possibly a response message. Two kinds of EPs are used: - Class 1: Elementary Procedures with response (success or failure). - Class 2: Elementary Procedures without response. For Class 1 EPs, the types of responses
description: The Secure File Transfer Protocol (SFTP) is a protocol that utilizes TCP as a transport protocol, providing secure file transfer capabilities. It operates at the application layer and is used for transferring files securely between a client and a server.
explanation: The text explicitly states that SFTP is a protocol that uses TCP for secure file transfers.  It's mentioned alongside other protocols like FTP, TFTP, HTTP, and VoIP, further classifying it as a telecommunications protocol.
section_title: 5.4.2	Application Layer Protocol
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