The mail protocol, right? Yes, that is considered part of the application layer.
Application Presentation Session
FTP operates in application layer of ISO OSI layered model.
Application gateway/proxy
HTML is read by a browser and a browser works at the Application Layer.
OSI stands for Open system interconnection model. Application layer is the seventh layer in OSI model.
application -top of osi model physical- bottom of osi model
Repeaters operate at the physical layer of the OSI model.
1. Repeaters (Operate at the OSI Physical Layer).2. Bridges (Operate at the OSI Data Link Layer).3. Routers {and Brouters} (Operate at the OSI Network Layer).
It operates on the data link layer of the OSI model (level 2). The switch creates a separate collision domain for each port. Although some switches operate on level 3 of the model and are called multi-layer switches.
application
application
E-mail and FTP, like all client applications, operate at the Application Layer.