LAPORAN
WIRESHARK HTTP
Soal :
1.
Is your browser
running HTTP version 1.0 or 1.1? What
version of HTTP is the server running?
Solution :
My browser running HTTP version 1.1 and the server
running HTTP version 1.1
2.
What languages
(if any) does your browser indicate that it can accept to the server?
Solution :
The language accepted is en-US,en;
3.
What is the IP
address of your computer? Of the
gaia.cs.umass.edu server?
Solution :
IP address of my computer : 192.168.1.101 and IP
address of server : 128.119.245.12
4.
What is the
status code returned from the server to your browser?
Solution :
The status code
returned is 200, it’s mean OK
5.
When was the
HTML file that you are retrieving last modified at the server?
Solution :
Last modified : Mon , 12 Dec 2016 06:59:01 GMT
6.
How many bytes
of content are being returned to your browser?
Solution :
Content length :
128 bytes
7.
By inspecting
the raw data in the packet content window, do you see any headers within the
data that are not displayed in the packet-listing window? If so, name one.
Solution :
no, I don’t see any in the HTTP Message below
For Answer
number 8 – 11
8. Inspect the contents of the first HTTP GET request
from your browser to the server. Do you
see an “IF-MODIFIED-SINCE” line in the HTTP GET?
There are no
IF-MODIFIED-SINCE in the first GET
9. Inspect the contents of the server response. Did the
server explicitly return the contents of the file? How can you tell?
Text returned in
response to first GET
10. Now inspect the contents of the second HTTP GET
request from your browser to the server.
Do you see an “IF-MODIFIED-SINCE:” line in the HTTP GET? If so, what
information follows the “IF-MODIFIED-SINCE:” header?
The information
: Mon, 12 Dec 2016 06:59:01 GMT
11. What is the HTTP status code and phrase returned
from the server in response to this second HTTP GET? Did the server explicitly return the contents
of the file? Explain.
The status code is not modified . The file has not
been modified! So the text of the file is NOT returned in the HTTP message
For number 12 - 15
12. How many HTTP GET request messages did your browser
send?
Answer : 1
Which packet number in the trace contains the GET
message for the Bill or Rights?
Answer : 8
13. Which packet number in the trace contains the status
code and phrase associated with the response to the HTTP GET request?
Answer: packet
10.
14. What is the status code and phrase in the response?
Answer: 200 (OK)
15. How many data-containing TCP segments were needed to
carry the single HTTP response and the text of the Bill of Rights?
Answer: three
packets (10, 11, 13 in the trace)
For number 16-17
16. How many HTTP GET request messages did your browser
send?
Answer: there
were three HTTP GET messages sent: packet 10 in the trace (to get the base
file), packet 17 (to get the Pearson logo) and packet 20 (to get the 5th
edition textbook cover)
To which Internet addresses were these GET requests
sent?
Each of these
three GET messages were sent to different IP addresses! Packet 10 was sent to 128.119.245.12, packet
17 to 165.193.123.218, and packet 20 to 134.241.6.82.
17. Can you tell whether your browser downloaded the two
images serially, or whether they were downloaded from the two web sites in
parallel? Explain.
Answer: The downloads occurred in parallel. Note that the two GET messages for the images
are in packets 17 and 20. The 200OK
reply containing the images sow up as packets 25, and 54. Thus the request for the second image file
(packet 20) was made BEFORE packet 25, the first image file was received.
Untuk soal no 18-19
18. What is the server’s response (status code and
phrase) in response to the initial HTTP GET message from your browser?
Answer: Packet 6
in the trace contains the first GET and packet 9 contains the REPLY. The server’s in packet 9 is: 401
Authorization Required
19. When your browser’s sends the HTTP GET message for
the second time, what new field is included in the HTTP GET message?
Answer: The HTTP
GET includes the Authorization: Basic: field
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