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1. Giới thiệu Wireshark
%YZ/Q[3\XGX<]3^X3 _X*3Z` =X`a]M0/)QbXGXcMLLd:]3]X]eM
<X3]facde<A<:]/"g3d:]3]X]eMfEh/<MG3X/iXGX+LMM<L3:<]`jk<,3YX
3Zd:]3]X]eM4`M0/)XGXX3[3\a`IXl<d:]3]XeaN[X]d:]3]X]e3YX3
*+,-EFGA3H ,
XGXa`IXm3Za]`*:(nL+no3Jh/0A:<&*X*3Z` =X3YXJ3:]k
N;XQ` =X+'dp]qXr+'3: _+F3YX 3L:L3&


:]K:LM<:Ne<QXV3'3L]XGX3[dXsM</&FMth/<MG3<]3^X+F3:]
+GA3HXl<QFc<X3]f43 )3GXa3:<]`j+LMM<L!XGX<]3^XNGX3:
3L:L3&uv3[QFa+GA3HXl<QFMtea7dwXl<ceLfe<Q`*&FMth/<MG34QFMt
CX4QbXGXea+&
7X'XmX)Q`Zh/<MG3XGX+LMM<L` =X3:/A\k<XGX3YX3Z<]3^X` =XC
eapacket sniffer.  3C=W47packet sniffer Qx3yX<d3/:L<AMzzM{+LMM<L`<
` =X|}s3~}3!+GA3HXl<QF•*MtX^<a}]qXZ3;I"/Xl<XGX
3: _<]3^X3:]XGX+LMM<LQ;Qx3&7packet sniffer 3Y*eaQ;`I&*h/<MG3XGX
+LMM<L`<` =X|asQrXGX^"maXGX<]3^X`<XFA3:+GA3H
Xl<QF4 N'Q<]_3Y|kd<XNL3XH*& )3Y4d<XNL3` =Xs
N'Q<]_` =X`;<X€*<:•:a3!d<XNL3MzzL:&<Aa]`*47packet sniffer s
7QX]dAXl<XGXd<XNL3`<` =X|]qXs3~}3!^"mad:]3]X]e`<XFA
3:+GA3HXl<QF&
v7" !`0AX€:<X2/3:VXXl<7packet sniffer . deaXGX<]3^Xy3:]3: _
=daA4XGX<]3^X3L:L3{aXGX^"my gLQQ:]gML:<Az3dXeL3{eak
3^3 _XFA3:+GAQF&d<XNL3MzzL:eadw3+X]dw+\+Xl<QF43 _X*
,dw&3Ld<XNL3X<d3/:LeQ:<:As7QX]dAXl<+CN/e!deN[3` =X|<A
s3~+GAQF&k+LMM<L` =X3:/A\Qr<]3^X3wX<]) 
4‚44UD4D%]qX4323X` =X`**3YXMY3:]XGXeN9e<AL:z:<+L43^
` =X3:/A\3'h/<3[3Q;s3eW X<dL3L:L3&:]v743[3Q;s3eWX]eaXGd
L3L:L34av3[323X<]3^X3wX<])3YXMY` =X`**3:]z:<+LR3L:L3&
x3323XXGXeN9e<AL:z:<+L` <X]3<323XXGX+LMM<L` =X|4s3~}3!323XXGX
<]3^X4^"m`<3YX33:+GAXl<QF&
adw3^,Xl<d<XNL3MzzL:ead<XNL3<<eAƒL:43^Z3;323XXGX3: _3:]7
3'`Jd<]3^X&Zea+` =XsA4d<XNL3<<eAƒL:dc/"L:M3<"fX2/3:VX323XXGX
+LMM<L` =X|Qrd:]3]X]e&uH"m 4X]:bXV3<h/<30+3!Z3;\/
3: _3:]XGX+LMM<L` =X|Qr<]3^X3:]v7&<XNL3<<eAƒL:Z/
*+,-EFGA3H P
`;"FXl<R3L:L3z:<+Lav3[X*3Z`;"<*"keJ/y"<3<:<+{Q3:]
R3L:L3z:<+L&*X„Z/`;"FXl<*"keJ/4v3[*X*3Z3:HXn/23:<

ML+L3Q3:]*"keJ/& )3Y*Z/X2/3:VXXl<ML+L3aX*3Z3:HX
:V3:<3'`JdX^<3:]`*&/1X…*Z/<]3^Xav3[4H"m4Z/
†eL`w/3MtX^<XGXX/icRf4f%f<AcRDfO
V3<MtM|"mK:LM<:Nd<XNL3MzzL:‡33d$}}ggg&g:LM<:N&]:}ˆX]XGXe<QaA4
X]dodXV3ZJI"/XGX+LMM<L`0` =X|4s3~}3!XGX<]3^Xr
XGX+^X`INGX</Xl<M3<XN<]3^X
2. Wireshark Lab : DHCP
7& '`JdD` =X|h/<UD<A‰
'`JdD` =X|h/<UD
,& ut  +I3  "<3<:<+  +  C<  3:v  3Y  3_  <  Xl<  ?  *  `w/  3
DMX]L:}zzL:}TLh/LM3}D3:<]`jk<XeL3aML:L:&i*MtX€:<M1
Xj/(aXj`HX&%1Xj3:]H"m` <:<a3:]dŠe<QX*1</
N'‰
*+,-EFGA3H ?
3+L
%:X$5&5&5&5
DLM3$,88&,88&,88&,88
%:X$7-,&7>@&7&7
DLM3$7-,&7>@&7&77,
%:X$5&5&5&5
DLM3$,88&,88&,88&,88
%:X$7-,&7>@&7&7
DLM3$7-,&7>@&7&77,
DML:L: ::XeL3
DMX]L:
zzL:
TLh/LM3

P& ;<X€eN9e<AL:Xl<+GAQFeav‰
;<X€eN9e<AL:ea$55$7L$LX$>>$-6$L?

?& G3:;a]Xl<D"MX]L:+LMM<Ld0QJ3!D:Lh/LM3+LMM<L
aG3:;d3]
8& G3:;Xl<:<M<X3]9D3:]3~3'`Jd3:]?3'`Jd`w/3Xl<D
yDMX]L:}zzL:}TLh/LM3}{QbQ<]\/‰^X‹Xl<3: _:<M<X3]9D‰
7& 0xd38t2330
,& 5n-,XP>8PX
:<M<X3]9Dea+I3M1#/` =X3F]:<QrXeL3&mX`HXXl<*` =XM|
"mX/X2dX]XeL3aDML:L:X*3Z` =XnGX`;h/<MYh/<Jk<XGX
3'`JdD|`as&
>& ]M3"…D`ZX^<`Y`;<X€4 `;<X€Xl<]M3N'X2dsX]`[
NN[33VXJX3:<]`jXl<?3'`Jd&[/`;<X€N'` =XnGX`;X]`[N
N[33VXJX3:<]`jXl<?3'`Jd4M</`*G3:;a]ea` =X"…3:]*"keJ/
x3:]?3'`JdN3:<]`j‰‰‰u!+i?3'`JdDyDMX]L:4zzL:4
TLh/LM34{X]Q[3`;<X€/(a`HX` =X3YXJ3:]eVX*"keJ/`*
*&
*+,-EFGA3H 8
Src: 0.0.0.0
Dst: 255.255.255.255
6& ;<X€Xl<DML:L:Xl<QFea‰
7-,&7>@&7&P>
@& :D3v`;<X€a]X€]M3Xl<QF3:]DzzL:+LMM<L&€:•
3'`JdDa]X^<`;<X€D
-& :]H"m3:N]X*3GX0:Le<Aa]k<]M3aDML:L:&G3:;a]Xl<3:<XLX]
32AN'X*Nba]X]+I33GX0:Le<A‰*3GX0:Le<Aa]QF`Œqdd‰
a`;<X€Xl<*eav‰
:Le<A<L3X;/3:GXJ+`ZNZ+M]G3h/G3:v|3'`JdD3~QaA
`[XGX+FM/QL3NGX& Trong thí nghiệm này ko có relay agent nào vì
D$5&5&5&5
75& 3HXX^X‹Xl<:]/3L:a+q3FM/dL33:]D]zzL:+LMM<L
T]/3L:được dung để lấy địa chỉ IP của router qua client.4Subnet mask Chúng được sử

dụng để phân chia một mạng lớn thành các mạng nhỏ hơn
77& :]H"m4]M3A/Xw/+I3`;<X€3:]DTLh/LM3+LMM<L&F`Œea+v‰
]M3A/Xw/`\;!`;<X€3:]3'`JdD:Lh/LM3
7,& <3HXX^XbXl<eL<ML3+L&F`Œea+eL<ML3+L3:]Q<]e0/‰
L<ML3+Lea3_<+a**eX]Q[33_<+a`;<X€"…&:]e<Q
aA43_<eL<ML3+LeaPaA
7P& ^X‹Xl<D:LeL<ML+LMM<Lea‰DML:L:` <:<3'QG]nGXsA/
Xw/Xl<DXl<XeL3&/AJvMtnA:<[/3j`Jd3~DXl<XeL3Q;+23‰
*+,-EFGA3H >
'`JdD:LeL<ML` =X"…`ZX]Q[3DML:L:+aXeL3`ŒM•Ma
` =X"…X]`;<X€&[/3'`JdD:LeL<MLQ;+233vM</`*`;<X€Mt` =X
"…X]`[N[3F3_<&
7?& a+MG3pQ]]3d†e3L:3:]X|<Mjg:LM<XN&23NŽ*•Ta]X„` =X|]qX
s3:]h/G3:v3:<]"jXGX*
Ty<"":LMMM]e/3]d:]3]X<e{ea<]3^X+a*"…X]JX`G"2/k<`;<
X€a`;<X€&
3. Wireshark Lab : DNS
7& FAMe]]N/d`Ze2A`;<X€Xl<gLQML:L:M<
,& FAMe]]N/d`ZnGX`;D%ML:L:XlXl<+I33: _`FCXr0/•/a]`*
*+,-EFGA3H 6
P& FAMe]]N/d +I33:]XGXD%ML:L:3:]‘/LM3],ea3:/A2`[+<eML:L:Xl<
A<]]+<e
?& .GX`;3'`Jd3:/A2D%a`Gd3:D%&V` =X|h/<<]3^XUD<A
‰
<]3^X$UD
DNS query
D%:LMd]"
*+,-EFGA3H @
8& j`HXXl<3'`Jd3:/A2D%eaQ<]/‰j/(eaQ<]/‰
j/($7-,&7>@&7&75@

j`HX$@&@&@&@
>& '`Jd3:/A2D%|!`;<X€eav‰D…dX]†`ZnGX`;`;<X3X]
D%ML:L:Xl<QF&,`;<X€daAX*1</N'‰
7-,&7>@&7&75@
,`;<X€aA1</
6& .o33'`Jd3:/A2D%&:/A2D%aA3/IXe]F‰*X*X^<c<MgL:Mfa]
N'‰
3AdL$
N'X^<<MgL:Ma]
@& .o33'`Jd`Gd3:&*Q<]/e]Fc<MgL:Mf‰3HXXm3Z3~e]F‰
*7gL:
-& .L+no3*%|3~]M3Xl<QF&*d`;<X€`HXXl<*%d…=d!Q23
X^`;<X€` =XX/X2d3:]3'`Jd`Gd3:D%‰
%$>?&765&-@&P,
Xl<D%:LMd]"$7-,&7>@&7&7
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4. Wireshark Lab : Ethernet & ARP
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77& u[3:<XGXI"/X<XLTXl<+GA3HXl<QF&–”<Xl<+iXI3G3:;eav‰
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*+,-EFGA3H 76
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Xw/T` =X3F]:<‰
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3:]d<XNL33:<XLaA‰
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5. Wireshark Lab : HTTP
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