What's the meaning of the tshark output fields?
Dear wireshark experts,
I got a tshark output image on ubuntu 16.04 after I ran the command curl www.baidu.com, as shown below. But I can't tell you the story from the output lines, because I can't find any mathematical relationships betweens the lines.
Could someone explain the meaning of each line, especially the field Ack and Win?
So appreciated in advance!
tcp wireshark tcpdump tshark
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
add a comment |
Dear wireshark experts,
I got a tshark output image on ubuntu 16.04 after I ran the command curl www.baidu.com, as shown below. But I can't tell you the story from the output lines, because I can't find any mathematical relationships betweens the lines.
Could someone explain the meaning of each line, especially the field Ack and Win?
So appreciated in advance!
tcp wireshark tcpdump tshark
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
add a comment |
Dear wireshark experts,
I got a tshark output image on ubuntu 16.04 after I ran the command curl www.baidu.com, as shown below. But I can't tell you the story from the output lines, because I can't find any mathematical relationships betweens the lines.
Could someone explain the meaning of each line, especially the field Ack and Win?
So appreciated in advance!
tcp wireshark tcpdump tshark
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
Dear wireshark experts,
I got a tshark output image on ubuntu 16.04 after I ran the command curl www.baidu.com, as shown below. But I can't tell you the story from the output lines, because I can't find any mathematical relationships betweens the lines.
Could someone explain the meaning of each line, especially the field Ack and Win?
So appreciated in advance!
tcp wireshark tcpdump tshark
tcp wireshark tcpdump tshark
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
asked Nov 26 '18 at 10:30
Gale YaoGale Yao
136
136
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
That's not related to tshark/wireshark, but generally to TCP protocol:
ACK(andSYN) are tcp flags being set during connection establishmentWinis also tcp parameter. see Window size
answered Nov 27 '18 at 14:20
kancomkancom
14
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what aboutLenfrom line 5 to 9, it is always 0. Why is that?
– Gale Yao
Dec 1 '18 at 1:58
add a comment |
FrameNumber Timestamp Source-IP-Address -> Destination-IP-Address Protocol TCP-Source-Port TCP-Destination-Port [TCP-FLAGS] Protocol-Specific-Description
SYN/ACK/WIN are related to the TCP protocol which is used for reliable transmission on top of the unreliable IP network
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
That's not related to tshark/wireshark, but generally to TCP protocol:
ACK(andSYN) are tcp flags being set during connection establishmentWinis also tcp parameter. see Window size
answered Nov 27 '18 at 14:20
kancomkancom
14
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what aboutLenfrom line 5 to 9, it is always 0. Why is that?
– Gale Yao
Dec 1 '18 at 1:58
add a comment |
That's not related to tshark/wireshark, but generally to TCP protocol:
ACK(andSYN) are tcp flags being set during connection establishmentWinis also tcp parameter. see Window size
answered Nov 27 '18 at 14:20
kancomkancom
14
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what aboutLenfrom line 5 to 9, it is always 0. Why is that?
– Gale Yao
Dec 1 '18 at 1:58
add a comment |
That's not related to tshark/wireshark, but generally to TCP protocol:
ACK(andSYN) are tcp flags being set during connection establishmentWinis also tcp parameter. see Window size
answered Nov 27 '18 at 14:20
kancomkancom
14
That's not related to tshark/wireshark, but generally to TCP protocol:
ACK(andSYN) are tcp flags being set during connection establishmentWinis also tcp parameter. see Window size
answered Nov 27 '18 at 14:20
kancomkancom
14
answered Nov 27 '18 at 14:20
kancomkancom
14
answered Nov 27 '18 at 14:20
kancomkancom
14
answered Nov 27 '18 at 14:20
kancomkancom
14
14
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what aboutLenfrom line 5 to 9, it is always 0. Why is that?
– Gale Yao
Dec 1 '18 at 1:58
add a comment |
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what aboutLenfrom line 5 to 9, it is always 0. Why is that?
– Gale Yao
Dec 1 '18 at 1:58
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what about
Len from line 5 to 9, it is always 0. Why is that?– Gale Yao
Dec 1 '18 at 1:58
Thanks. I've read through the RFC, and now I understand how to establish and close a TCP connection. But what about
Len from line 5 to 9, it is always 0. Why is that?– Gale Yao
Dec 1 '18 at 1:58
add a comment |
FrameNumber Timestamp Source-IP-Address -> Destination-IP-Address Protocol TCP-Source-Port TCP-Destination-Port [TCP-FLAGS] Protocol-Specific-Description
SYN/ACK/WIN are related to the TCP protocol which is used for reliable transmission on top of the unreliable IP network
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
add a comment |
FrameNumber Timestamp Source-IP-Address -> Destination-IP-Address Protocol TCP-Source-Port TCP-Destination-Port [TCP-FLAGS] Protocol-Specific-Description
SYN/ACK/WIN are related to the TCP protocol which is used for reliable transmission on top of the unreliable IP network
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
add a comment |
FrameNumber Timestamp Source-IP-Address -> Destination-IP-Address Protocol TCP-Source-Port TCP-Destination-Port [TCP-FLAGS] Protocol-Specific-Description
SYN/ACK/WIN are related to the TCP protocol which is used for reliable transmission on top of the unreliable IP network
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
FrameNumber Timestamp Source-IP-Address -> Destination-IP-Address Protocol TCP-Source-Port TCP-Destination-Port [TCP-FLAGS] Protocol-Specific-Description
SYN/ACK/WIN are related to the TCP protocol which is used for reliable transmission on top of the unreliable IP network
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
answered Jan 20 at 8:37
MoshohayebMoshohayeb
13318
13318
add a comment |
add a comment |
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