DATA is sent from device A to device B, the 5th layer to receive data at B is APPLICATION layer. The application layer is a layer in the Open Systems Interconnection (OSI) seven-layer model and in the TCP/IP protocol suite. It consists of protocols that focus on process-to-process COMMUNICATION across an IP network and provides a firm communication interface and end-user services. Example: HTTP, TELNET, FTP, IMAP etc.