Describe how the closing of the connection is different from Step 4.
What will be an ideal response?
The TCP connection times out and the closing is initiated by the server first. The client receives FIN sent by server and corresponds to the closing action.
Frame 35
```
(66 bytes on wire, 66 bytes captured)
Arrival Time: Aug 23, 2003 04:22:42.475078000
Time delta from previous packet: 59.937324000 seconds
Time relative to first packet: 83.621974000 seconds
Frame Number: 35
Packet Length: 66 bytes
Capture Length: 66 bytes
Ethernet II, Src: 00:06:5b:4b:e1:da, Dst: 00:06:5b:4b:e0:dd
Destination: 00:06:5b:4b:e0:dd (00:06:5b:4b:e0:dd)
Source: 00:06:5b:4b:e1:da (00:06:5b:4b:e1:da)
Type: IP (0x0800)
Internet Protocol, Src Addr: 10.0.5.22 (10.0.5.22), Dst Addr: 10.0.5.11 (10.0.5.11)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x10 (DSCP 0x04: Unknown DSCP; ECN: 0x00)
0001 00.. = Differentiated Services Codepoint: Unknown (0x04)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 52
Identification: 0xc2b6
Flags: 0x04
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: TCP (0x06)
Header checksum: 0x59dd (correct)
Source: 10.0.5.22 (10.0.5.22)
Destination: 10.0.5.11 (10.0.5.11)
Transmission Control Protocol, Src Port: 23 (23), Dst Port: 3113 (3113), Seq:
805361941, Ack: 836600640, Len: 0
Source port: 23 (23)
Destination port: 3113 (3113)
Sequence number: 805361941
Acknowledgement number: 836600640
Header length: 32 bytes
Flags: 0x0011 ( FIN , ACK)
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...1 = Fin: Set
Window size: 5792
Checksum: 0x2ada (correct)
Options: (12 bytes)
NOP
NOP
Time stamp: tsval 1585555, tsecr 1579755
```
Frame 36
```
(66 bytes on wire, 66 bytes captured)
Arrival Time: Aug 23, 2003 04:22:42.475577000
Time delta from previous packet: 0.000499000 seconds
Time relative to first packet: 83.622473000 seconds
Frame Number: 36
Packet Length: 66 bytes
Capture Length: 66 bytes
Ethernet II, Src: 00:06:5b:4b:e0:dd, Dst: 00:06:5b:4b:e1:da
Destination: 00:06:5b:4b:e1:da (00:06:5b:4b:e1:da)
Source: 00:06:5b:4b:e0:dd (00:06:5b:4b:e0:dd)
Type: IP (0x0800)
Internet Protocol, Src Addr: 10.0.5.11 (10.0.5.11), Dst Addr: 10.0.5.22 (10.0.5.22)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x10 (DSCP 0x04: Unknown DSCP; ECN: 0x00)
0001 00.. = Differentiated Services Codepoint: Unknown (0x04)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 52
Identification: 0x983a
Flags: 0x04
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: TCP (0x06)
Header checksum: 0x8459 (correct)
Source: 10.0.5.11 (10.0.5.11)
Destination: 10.0.5.22 (10.0.5.22)
Transmission Control Protocol, Src Port: 3113 (3113), Dst Port: 23 (23), Seq:
836600640, Ack: 805361942, Len: 0
Source port: 3113 (3113)
Destination port: 23 (23)
Sequence number: 836600640
Acknowledgement number: 805361942
Header length: 32 bytes
Flags: 0x0011 ( FIN, ACK )
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...1 = Fin: Set
Window size: 5840
Checksum: 0x1340 (correct)
Options: (12 bytes)
NOP
NOP
Time stamp: tsval 1585748, tsecr 1585555
```
Frame 37
```
(66 bytes on wire, 66 bytes captured)
Arrival Time: Aug 23, 2003 04:22:42.475847000
Time delta from previous packet: 0.000270000 seconds
Time relative to first packet: 83.622743000 seconds
Frame Number: 37
Packet Length: 66 bytes
Capture Length: 66 bytes
Ethernet II, Src: 00:06:5b:4b:e1:da, Dst: 00:06:5b:4b:e0:dd
Destination: 00:06:5b:4b:e0:dd (00:06:5b:4b:e0:dd)
Source: 00:06:5b:4b:e1:da (00:06:5b:4b:e1:da)
Type: IP (0x0800)
Internet Protocol, Src Addr: 10.0.5.22 (10.0.5.22), Dst Addr: 10.0.5.11 (10.0.5.11)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x10 (DSCP 0x04: Unknown DSCP; ECN: 0x00)
0001 00.. = Differentiated Services Codepoint: Unknown (0x04)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 52
Identification: 0xc2b7
Flags: 0x04
.1.. = Don't fragment: Set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: TCP (0x06)
Header checksum: 0x59dc (correct)
Source: 10.0.5.22 (10.0.5.22)
Destination: 10.0.5.11 (10.0.5.11)
Transmission Control Protocol, Src Port: 23 (23), Dst Port: 3113 (3113), Seq:
805361942, Ack: 836600641, Len: 0
Source port: 23 (23)
Destination port: 3113 (3113)
Sequence number: 805361942
Acknowledgement number: 836600641
Header length: 32 bytes
Flags: 0x0010 ( ACK )
0... .... = Congestion Window Reduced (CWR): Not set
.0.. .... = ECN-Echo: Not set
..0. .... = Urgent: Not set
...1 .... = Acknowledgment: Set
.... 0... = Push: Not set
.... .0.. = Reset: Not set
.... ..0. = Syn: Not set
.... ...0 = Fin: Not set
Window size: 5792
Checksum: 0x1370 (correct)
Options: (12 bytes)
NOP
NOP
Time stamp: tsval 1585555, tsecr 1585748
```
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