Analysis of an HTTP packet trace

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Pregunta 1: A simple HTTP trace

Network engineers often need to capture the packets that are exchanged over a network to debug various types of problems. Here is a simple packet trace

Open this packet trace in wireshark or use tcpdump on the command line determine which of the affirmations below are correct.

The MIME Content-Type of the retrieved web object is text/html

The URL of the retrieved web object is http://nghttp2.org/robots.txt

The URL of the retrieved web object is http://nghttp2.org/

The response returned by the server is 62 bytes long.

The server returns a status code of 200 which indicates a success.

The client used to retrieve this object is Google Chrome

The client uses HTTP/1.0

The response was served by the Apache server

Pregunta 2: The HTTP trace

#	Length	Summary
0	20 bytes	`Transmission Control Protocol, Src Port: 44914, Dst Port: 80, Seq: 0, Len: 0`
1	20 bytes	`Transmission Control Protocol, Src Port: 80, Dst Port: 45118, Seq: 0, Ack: 1, Len: 0`
2	20 bytes	`Transmission Control Protocol, Src Port: 45118, Dst Port: 80, Seq: 1, Ack: 1, Len: 0`
3	117 bytes	`Hypertext Transfer Protocol`
4	20 bytes	`Transmission Control Protocol, Src Port: 80, Dst Port: 45118, Seq: 1, Ack: 86, Len: 0`
5	497 bytes	`Hypertext Transfer Protocol`
6	20 bytes	`Transmission Control Protocol, Src Port: 45118, Dst Port: 80, Seq: 86, Ack: 466, Len: 0`
7	20 bytes	`Transmission Control Protocol, Src Port: 80, Dst Port: 45118, Seq: 466, Ack: 86, Len: 0`
8	20 bytes	`Transmission Control Protocol, Src Port: 45118, Dst Port: 80, Seq: 86, Ack: 467, Len: 0`
9	20 bytes	`Transmission Control Protocol, Src Port: 80, Dst Port: 44914, Seq: 0, Ack: 1, Len: 0`
10	20 bytes	`Transmission Control Protocol, Src Port: 44914, Dst Port: 80, Seq: 1, Len: 0`
11	20 bytes	`Transmission Control Protocol, Src Port: 80, Dst Port: 45118, Seq: 467, Ack: 87, Len: 0`

0000 af72005014178133 00000000a0007210
0010 88c20000

0000 ¯r.P...3......r.
0010 .Â..

Transmission Control Protocol, Src Port: 44914, Dst Port: 80, Seq: 0, Len: 0
- Source Port: 44914
- Destination Port: 80
- TCP Segment Len: 0
- Sequence number: 0 (relative sequence number)
- Acknowledgment number: 0
- 1010 .... = Header Length: 40 bytes (10)
- Window size value: 29200
- Calculated window size: 29200
- Checksum: 0x88c2 [unverified]
- Urgent pointer: 0

Autor(es)	Olivier Bonaventure
Fecha de entrega	Sin fecha de envío
Tiempo límite de envío	Sin límite de envío
Etiquetas de categoría	http

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