计算机网络自顶向下方法试验三报告 本文关键词：向下，计算机网络，试验，方法，报告
计算机网络自顶向下方法试验三报告 本文简介：陕西师范大学计算机网络实验报告年级：2010级姓名：陈翠萍学号：41012227实验日期：2012.9.24实验名称：WiresharkLab:HTTP1至7题总的截图：1.IsyourbrowserrunningHTTPversion1.0or1.1?WhatversionofHTTPisthes
计算机网络自顶向下方法试验三报告 本文内容：
陕西师范大学
计算机网络
实验报告
年级：
2010级
姓名：
陈翠萍
学号：
41012227
实验日期：
2012.9.24
实验名称：Wireshark
Lab:
HTTP
1至7题总的截图：
1.
Is
your
browser
running
HTTP
version
1.0
or
1.1?
What
version
of
HTTP
is
the
server
running?
Answer:
Both
are
running
HTTP
1.1
2.
What
languages
(if
any)
does
your
browse
r
indicate
that
it
can
accept
to
the
server?
Answer:
zh-cn
3.
What
is
the
IP
address
of
your
computer?
Of
the
gaia.c
s.umass.edu
server?
Answer:
My
IP
address
is
10.2.136.49
and
the
server’s
is
128.119.245.12
4.
What
is
the
status
code
returned
from
the
server
to
your
browser?
Answer:
截图
HTTP/1.1
200
OK
(text/html)
5.
When
was
the
HTML
file
that
you
are
retrieving
last
modified
at
the
server?
Answer:
截图：
Last-Modified:
Mon,24
sep
2012
12:44:01
GMT
6.
How
many
bytes
of
content
are
being
returned
to
your
browser?
Answer:
截图
Content-Length:
128
7.
By
inspecting
the
raw
data
in
the
p
acket
content
window,do
you
see
any
headers
within
the
data
that
are
not
displayed
in
the
packet-lis
ting
window?
If
so,name
one.
Answer:
No
all
of
the
headers
can
be
found
in
the
raw
data.
8
至11题截图：
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?
Answer:
No
9.
Inspect
the
contents
of
the
server
response.
Did
the
serv
er
explicitly
return
the
contents
of
the
file?
How
can
you
tell?
Answer:
Yes，
because
we
can
see
the
contents
in
the
Line-based
text
data
field.
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?
Answer:
截图：
Yes.
The
information
following
is:
mon,24
sep
2012
12:44:01
GMT
which
is
the
date
of
the
last
modification
of
the
file
from
the
previous
get
request
11.
What
is
the
HTTP
status
code
and
phrase
returned
from
the
server
in
response
to
this
second
HTTP
GET?
Did
th
e
server
explicitly
return
the
contents
of
the
file?
Explain.
Answer:
截图：
The
status
code
and
phrase
returned
from
the
server
is
HTTP/1.1
404
Not
Modified.
The
server
didn’t
return
the
contents
of
the
file
since
the
browser
loaded
it
from
its
cache.