ftp i.e file transfer protocol,used to transfer a file from node to node
FTP works at OSI layer 7, the Application layer
E-mail and FTP, like all client applications, operate at the Application Layer.
Application Layer 7
FTP operates in application layer of ISO OSI layered model.
FTP (File Transfer Protocol) is an application layer, or Layer 7, protocol.
since it is a server it would be at your phyiscal layer, or if you are taling about the FTP service then that will be at the applaction level.
Session
FTP and Telnet are considered OSI layer 7 protocols. If you are blocking the service, then layer 3 or 4 (network or transport) is responsible.
File Transfer Protocol (FTP) is found in the TCP/IP stack of the Application Layer of the OSI reference model. FTP is specialized for sending and receiving files.
hub work at physical layer of osi model
2
Layer 1 - the physical layer
Telnet is an application layer protocol (Layer 7). Its functionality is similar to any of the layer 7 protocols, including DHCP, DNS, FTP, etc.