Question: In a Go - Back - N ( GBN ) protocol, what does the sender do when it detects a lost packet? Question options: It

In a Go-Back-N (GBN) protocol, what does the sender do when it detects a lost packet?
Question options:
It increases the packet transmission rate.
It retransmits the lost packet and all subsequent packets.
It retransmits only the lost packet.
It sends a special error message to the receiver.
It waits for the receiver to request the packet again.

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