global configuration mode
all but IP routing protocols
Generically speaking, it is the shell or user interface. It may be a command prompt or a graphical user interface (or a combination of both). The layer of the operating system that is directly accessible to the user is known as the application layer; it runs all of the applications that the user interacts with.
The difference between Layer 2 and Layer 3 switching is the type of information inside the frame that is used to determine the correct output interface. With Layer 2 switching, frames are switched based on MAC address information. With Layer 3 switching, frames are switched based on network-layer information.
Network Interface Layer
You can display prompts on the command line instead of using a dialog box, or switch back again. This option is useful primarily when using scripts.Some functions are available both on the command line and in a dialog box. In many cases, you can enter a hyphen before the command to suppress the dialog box and display prompts on the command line instead. For example, entering layer on the command line displays the Layer Properties Manager. Entering -layer on the command line displays the equivalent command line options. Suppressing the dialog box is useful for compatibility with earlier versions of GstarCAD? and for using script files. There may be slight differences between the options in the dialog box and those available on the command line.
no ip domain-lookup
It is a layer 3 switch
Router is a Layer 3 (Network Layer)device that checks packet's IP Address at input interface & routes them to interface connected to destination network if available.
The data-link layer The physical layer
The interface between the physical layer and the network link layer.
because one layer is the electrical part, and the other layer is the place where the switch is on.
application layer