NACK vs. ACK? When to use one over the other one?
Jan 12, 2016 · 24 Personally I don't even feel that there is a need for ACK. It's faster if we just send NACK (n) for the lost packets instead of sending an ACK for each received packet. So when/which …
Why do I see a RST, ACK packet instead of a RST packet?
Why do you think there should be a RST segment before RST/ACK? Maybe you could provide an example of such a packet trace?
Why need Ack flag if we already have ack number in TCP
Mar 19, 2022 · The ACK flag indicates that the Acknowledgment Number field is significant, ie. containing a meaningful value. When a socket connection has already been established that is …
Why does a pure ACK increment the sequence number?
Feb 1, 2023 · An ACK segment, if carrying no data, consumes no sequence number. I found the answer to your question in Computer Networking: A Top-Down Approach (Kurose and Ross): Upon receiving …
TCP ACK confusion - Network Engineering Stack Exchange
Apr 8, 2021 · The receiver can also selectively ACK (SACK) 51-100 to avoid a retransmission of successfully received segments. Without selective ACK, the sender retransmits 50-100. Note that …
Window Size and ACK Number - Network Engineering Stack Exchange
Copy-pasting from my lecturer's slides: • Receiver indicates the window size is 3000 • Transfer goes ahead • Acknowledge every 3000 bytes • Receiver increases window size to 4000 • 4000 bytes ...
Why is the last ACK needed in TCP four way termination
The question of why the last ACK is required is just that nay FIN only means that the sender of the FIN is done sending, and it must still be open to receive more segments, and it must resend any …
Wireshark filter for specific SYN packet which never received a SYN/ACK
Nov 17, 2023 · Is there a way in wireshark to find out a single SYN that does not get answered by SYN/ACK?
tcp - what's the acknowledgement number after retransmitting the ...
Aug 17, 2020 · The very first ACK is correct. The acknowledgement number is the next expected segment number, and it acknowledges everything prior to that segment number, so the diagram is …
For TCP, what is the justification that ACKs are Last Byte Received + 1 ...
Jun 9, 2022 · Intuitively, it makes more sense that the ACK be the last byte received. Essentially, the receiving end says. I have received up to N bytes Then, the sender will receive that ACK that says N …