Looking at the TCP header (Figure 24.7), we find that the sequence number is 32 bits long, while the window size is only 16 bits long. Does this mean that TCP is closer to the Go-Back-N or Selective-Repeat protocol in this respect?

Figure 24.7 TCP segment format 20 to 60 bytes Header Data a. Segment 16 31 Source port address 16 bits Destination port address 16 bits Sequence number 32 bits Acknowledgment number 32 bits HLEN Window size Reserved 6 bits Checksum 16 bits 4 bits 16 bits Urgent pointer 16 bits Options and padding (up to 40 bytes) b. ader