DA3_Wireshark_v0.1

Khoa Cng Ngh Thng Tin Trng i Hc Khoa Hc T Nhin B mn Mng My Tnh v Vin Thng

Mng My Tnh Trang 1

N 3 - MN MNG MY TNH

Ch : Bt v phn tch gi tin

Quy nh:

- Sinh vin lp nhm 2 ngi thc hin n 2 (t do, nhng phi trong cng

mt lp hc).

- Thi gian np bi: 23g55, ngy 26/05/2014 trn moodle mn hc.

- Nhm sinh vin chp li mn hnh kt qu cc gi tin minh chng cho cu tr

li ca mnh, sau lu li vi tn .pdf. Nhng cu tr li

khng c hnh minh ho s khng c chm. Bi lm cn trnh by khoa

hc, r rng gip GV d chm bi. Khuyn khch mt hnh chp s minh ha

c cho nhiu cu tr li, nn s dng phn mm MS Paint khoanh vng

cu tr li cho r rng. Bi lm khng di qu 15 trang A4.

- Sinh vin np bi qua trang Moodle ca mn hc theo link ca lp mnh

- Cc bi ging nhau s b KHNG im phn thc hnh v RT hc phn

ny.

- Nhng sinh vin lm sai qui nh s khng c chm im tng ng 0

im bi thc hnh ny.

- Lu : sinh vin tt tt c cc dch v mng trn my trnh vic wirewhark bt

qu nhiu gi tin khng mong mun v i lch vi yu cu ca bi.

Ni dung:


Mng My Tnh Trang 2

Bi 1:

M hnh:

Chun b:

1. Chng trnh Vmware tt dch v DHCP

2. Client l my tht. Server l my o (ci t Windows Server 2003 hoc Windows

Server 2008). Client s dng card VmNet1 kt ni vi card mng (Host-Only)

duy nht ca server.

3. Ci t dch v DHCP trn my server v cu hnh cp pht a ch cho mt lp

mng 192.168.xx.0/24 (vi xx l tng hai s cui ca 2 m s sinh vin).

4. Ci t Wireshark trn my client.

5. Cu hnh cho my client nhn IP ng.

Tin hnh bt gi tin trn my client theo cc bc sau:

1. M ca s Windows Command Prompt (StartRuncmd) v g lnh

ipconfig /release

2. Khi ng qu trnh bt gi tin ca Wireshark.

3. Quay li ca s Windows Command Prompt g lnh ipconfig /renew

4. i n khi lnh ipconfig /renew kt thc, g lnh ipconfig /renew mt ln na.

5. i n khi lnh ipconfig /renew th hai kt thc, g lnh ipconfig /release mt

ln na.

6. Cui cng, thc hin li lnh ipconfig /renew ln th ba.

7. Kt thc qu trnh bt gi tin ca Wireshark.

Sinh vin s dng cc nh chp qu trnh bt gi tin kt hp vi gii thch ngn gn

tr li cc cu hi sau:

1. Cc gi tin DHCP c gi da trn TCP hay UDP?

2. V th thi gian th hin th t ca bn gi tin DHCP

Discover/Offer/Request/ACK pht sinh u tin gia client v server. Vi mi gi

tin, xc nh port ngun v port ch?


Mng My Tnh Trang 3

3. a ch tng Datalink ca my client l g?

4. Cc gi tr no trong gi tin DHCP Discover khc vi gi tin DHCP Request?

5. Xc nh a ch IP ngun v a ch IP ch c dng trong bn gi tin DHCP?

6. Xc nh a ch IP ca my server?

7. Xc nh gi tin cha thng tin v a ch IP m server s cp cho client. a ch

ny l bao nhiu?

8. Gii thch ngha ca trng router v subnetmask trong gi DHCP Offer?

9. Xc nh a ch IP m my client yu cu server trong gi tin DHCP Request?

10. Gii thch ngha ca lease time. Xc nh lease time trong trng hp ny?

11. Chc nng ca gi tin DHCP Release l g? Nu gi tin ny b mt th s nh th

no?

Bi 2 :

Yu cu:

- Xy dng m hnh nh hnh v

- Trong :

My server1 v server 2:

nh tuyn sao cho my client c th kt ni vi DNS Server

Ci t chng trnh Wireshark

My DNS server:

S dng chng trnh my o VMWare to my server v ci t h

iu hnh Windows server 2003.

Ci t dch v DNS Server v cu hnh qun l tn min

dns_xx.com (vi xx l hai s cui trong MSSV). Min ny ch c 2

my tnh c tn ln lt l client.dns_xx.com (my client) v

server.dns_xx.com (my server)

My client:

S dng chng trnh my o VMWare to my client.

Ci t chng trnh Wireshark


Mng My Tnh Trang 4

Cu hnh cho my client s dng dch v DNS do my DNS server

cung cp.

Thao tc:

Thc hin cc thao tc sau trn my client:

- Khi ng qu trnh bt gi tin ca Wireshark trn my client, server 1 v

server 2

- Trn my client, m ca s Windows Command Prompt ( Start Run

cmd ) v g lnh nslookup server.dns_xx.com.

- i n khi cu lnh hon tt, dng qu trnh bt gi tin ca Wireshark c

3 my.

Cu hi :

Sinh vin s dng cc nh chp qu trnh bt gi tin kt hp vi gii thch ngn

gn tr li cc cu hi sau :

1. a ch IP ch trong gi tin DNS query l g? a ch ny c phi l a ch ca

my server khng ?

2. Trng Type trong gi tin DNS query c gi tr l g? ngha?

3. Trong gi tin DNS response, c bao nhiu kt qu tr li c cung cp? ngha

c th ca tng thng tin trong cc kt qu tr li l g?

4. Sinh vin s dng cc nh chp qu trnh bt gi tin v s gi v nhn cc

gi tin DNS trong qu trnh phn gii tn min trn theo trnh t thi gian: cc gi

tin c gi t client -> Server 1-> Server2 -> DSN Server v ngc li (cc gi

tin ny bt c trn client, server1 v serv2). Vi mi gi tin, hy cho bit a

ch IP (ngun, ch n) v MAC (ngun, ch n) ca tng chn.

Documents

DA3_Wireshark_v0.1