To be honest, I am not sure. I do not recall any transfer signs, but there must be some, since I assume there are people connecting to internal Egyptian flights. I think one has to exit the terminal and then enter through the departure front. If you have printed your CAI-DXB return BP, then you might be okay.

If you are in Y, it takes quite a while to get off the plane. The terminal used by EK does not have air bridges. F and J deplane first through the front door, board the bus, then get driven to the terminal. I noticed that it was only after we got off the bus and walked into the terminal that they opened the second door for Y to start deplaning. Since I have only flown into CAI once so far, I cannot say for certain if they do this every time. I was on a two-class 777-300.