switch interfaces

once i go through with my ccnp preparation i found this command in the book.

switch(config)#interface fastethernet 1/2/24

In this 2 is the module number
24 is the port number

What is the 1?

The slot.

once i go through with my ccnp preparation i found this command in the book.

switch(config)#interface fastethernet 1/2/24

In this 2 is the module number
24 is the port number

What is the 1?

Elohim, isn't the "slot" the 2 here?

As far I as can remember from my CCNA, 1 is called the "plane" number here. I might be confused.

On cisco devices that support port-adapters, cisco uses x/y/z to denote interface references, where x = slot, y = port adapter, and z = port.

Elohim, isn't the "slot" the 2 here?

As far I as can remember from my CCNA, 1 is called the "plane" number here. I might be confused.