 Hi, I'm Andy from readle and in this video we're going to be talking about a frame or a node now when we say frame We don't mean the kind of thing that you would put around a picture in the intercom world a frame or a node refers to a Physical structure into which different cards can be inserted to make up the central unit to which other elements will connect The frame itself can't really do very much. It needs the cards to operate But in the same manner the cards themselves can't operate alone. They need the frame We also use the term node when we're talking about a frame because it is a connection point for lots of different elements in your system We can use both frame and node interchangeably But typically we use frame when we're talking about the element the unit more as a physical unit and node more as a connection point When we use node It's also analogous to in a computer network a switch in that lots of elements are connected to it It makes the connections between them and then the data can flow