Question: A Go-Back-N sender just receives an ACK packet with sequence number 14. This ACK number falls within sender's window. Sender's window size is 6.

A Go-Back-N sender just receives an ACK packet with sequence number 14.

A Go-Back-N sender just receives an ACK packet with sequence number 14. This ACK number falls within sender's window. Sender's window size is 6. Every packet embeds a k-bit sequence number field (k is an unknown constant). Which of the following definitely CANNOT be the sequence number of the next packet transmitted by the sender? A. 9 . 4 . 15 D. 19 . 20

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