A scenario contains three nodes and one CBR app between 1 and 2 nodes.
When a data frame is sent by the node 1,
It will get received at the node 2 and 3.

1. node will receive the whole frame and then it will decide whether to discard the frame or not.
2. node will receive only header part of the frame and then it will decide whether to discard the frame or not.

consider case 2 for node 3.

After receiving the header part of the frame, what are parameters that i have to check while i am receiving the header.

And also in what conditions i have to receive the data frame at the node. I mean to say that, There is some conditions like node should not present in the wating state for CTS or ACK.

Is this right?

If it is not then please explain some way how to understand this.