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  !
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 1 !2.3%% 14$
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(:;
 >?@A?BCC@BD!4E+%1.F@G>FBB@BD!4
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 !;
 !
 "#$%&'()*%+&,(K 2=C>L+M?BCCENO)+%0+!
 7P(&Q6=C=!(B;@$(:
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 "#$%&'()*%+"-%+./0"#$%&'(120314-0"#$%&'(5)(6_(:N
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<J+!LFa `6N?LFa%_LFa;
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f[XgV CTX C;
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XZggn C!&'`;


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 _T;`=$!60++q++4(.+5%+/
43%% !=;_T;`Jm0
!(52$614$%%!bFK@
GFL@BB;;;
 n!(5_T;`J4#7&*6(:!8&Q6
 !>La<ra<bo@GF?@E;O)+%0s=J`&&*
8%C#`=)R+q(!5=#4.$/
(:%;
 Fj(:!(5_T;`!$ \m#&*
C#` RC+&*(! CtQ8C!4Cj(:
Cj(:!(5X();
 n!(5_T;`J(+%_T;[%_T;X;_5Cj(:$!(5_T;[%
_T;XCt&*+]uB!1;
 _TJ +!(:-&N(:B!1!-(e!GFL@!-
(e!bFK@(:!(: $boFK;
<!:=
 &>?%?@A<5?LFa>?CBL+F C BaBEM&'
!C `6+%58(.+5 700!
$&'()5!8%4#&5Cj(:
5!%H`;?LFa+%0(LFa0]`LFaJ(:

1()$"5!/48(.+5C0!
v `6w!?LFa+%(!+&*(.+5#`>L!D+!(E%#+
>I+!(E4 2(.+5#`!Q8C!(.+5#
+;
 B#0"C1:="X1 4$0X1N0
10<bx0+%%(:><oE;
*+,-./01
2Modem ADSL:!(B?LFa4%!&'()5!>\]+%+!+
+!!E%&'()% 3%0;
2Mạch vòng/Local Loop:a%$&'()5! R&'f
&'Cj(:%(:;
*+,-./+**34*56
+ DSLAM (DSL Access Multiplexer):W0("4 !CM+%0
 1LFa&*-/%(:;
LFa?+"(.+5f$\LFa%3*%$+"
0!Q&K[x[!-0o<Mh>[TT CEd"&GBB
(.+5;
+ BAS (Broadband Access Server):+% -.LFa?%bobGFb;
:W?F+%J/!%#+$!6J&4%!
GBBJy# #!!4 GFb&*`$;
+ ISP (Internet Service Provider):+%%(:GBB;<$GFb#
&'%30G?b>GBB?BCCb!(BEN%(:
4GBB;
 &DE%+(&>(FG%HI%&0"J%+:=?LFaCj(:4pz4)
B!1C>{LE!-4p`J]>x|x!<B+E;_
4pz4)B!1C(#1&+&*$ 5(#
1&` 0(# #!5R$&*`);_4p`J
](#1&+2!(#1&`!5C
71!Q&4p%)`)(!J\}5`j+q
5C6Q;L"4&*5LFa?;

;:
 &>?%?@A<<GKK~GFL@+%&*$/f5!
C>B+B!GL@MGBB(L+@BD!4E4#74!%
!%CJ.$1::!8+!R(:>!%
!EfJ&'Cj(:J/` 0C$!
:•&*sJ;
 >1.JK?&L%&FM1&NO1PQ:<<GKK&h+!R(:J+%N
^4*567%%%5(*!z8J>!E(.+5R#d
B!';_(:N(:8R(:6!d
24*56.8$%5(*"JHC+BB+BB`(B!B`%$5
 $!>BCCB(+CCBCE;_(:N(:66}d
^4*569%%5(*+%$(:C*
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 B#0"C1HI%&1PQ:K!GFL@Jh+!4+%4WLk;
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 &aJf#Q%4?\A&?@%4K? <R! !".&Q5
8(9.RY* #!5/8(9f
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$5)ƒ #!55Czd
 h%+0"L%&%+JK?N?120&\(&i%.JK?0&aJH?\#AK%+j.k(4[0j&@0&3%+0"#$g%
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<R$4;
<R&'()&'(%;
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K8(9;
K8(9=;
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+5_!LB!+BGbK_d
 B#0"C1_
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%%;
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=f%(:4$%%&*+m(:5
=#C*=+q;
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()(940C*$J.#&=+&*
++;<$+%$&Q58(9./
8(95.$/1%$%1%4$
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y:w0&?1h%+.k(4[0j6zFO%+N/)]Jf#]%r
 {|uZ}
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 bo@Y*!6?KxBB;bo@Yƒ$(:!(.+5R

#0!%4#7 70;
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/C+&*$=1/4.oaK% 0;
 bo@58(9X8XC*=X8e[C*
=bo@J/Y*RNR)C! C%;
~ U}R:RU}R
K08048(9&']+%+&*
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Q †)> CE;@!%08(9\&*! 20Q
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548J//+%08[95J/J
[ X h de%!$;<mJ/S8$
5+%i%[&'8:0%! 7mJ
/(eQ$5;O8JJ~+%Y$J/
(5!84qC);K3=$C (e!Y$
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+%0 > CE;
+%0 (> (E;
7•vu€8VV8p
• V
 ‚04>%&0"ƒ10?„($…%!R;
 ‚04>%&+?>%0?„(
^K)= B;
y€)=&'()B!;
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