שאלה | How does the receiver respond to packets falling outside its expected window range in the Selective Repeat protocol?

How does the receiver respond to packets falling outside its expected window range in the Selective Repeat protocol?

		It ignores packets outside the expected window range but acknowledges them to indicate proper reception.
		It immediately discards packets falling outside the window range to conserve buffer space.
		It sends a selective acknowledgment (SACK) message to inform the sender of the discrepancy.
		It requests retransmission of all packets outside the window range before processing further packets.