lezione 10 17-4-2013 peertopeer

21
7/28/2019 Lezione 10 17-4-2013 PeerToPeer http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 1/21 (%*! (%((%* 8,+ Srfkfssh> jdkulbjhzbdlf ’kditb 9+< kditb‛ f ’`bifsghrblm‛  5,+ Jfllb hi `ulzbdlhkfltd afb sbstfkb  pffr td pffr  :,+ Ih rfspdlshebibtã afii‒utfltf pfr vbdihzbdlf afi jdpyrbmgt lfi `bif sghrblm 1,+ Ih rfspdlshebibtã afi prdvbafr  1,8,+ Ih mburbspruaflzh bthibhlh   1,5,+ Bi jhsd ’Qgf Sbrhtf Ehy‛  6,+ Ahth rftfltbdl> bi jdl`ibttd trh jdpyrbmgt f abrbttd hiih rbsfrvhtfzzh afii‒utfltf (( 0,+ Jdljiusbdlb> ih absjdllfssbdlf jdkf ’ahklhtbd‛4 ih ifmbsihzbdlf `rhljfsf f bi sbstfkh ’  :+strbof+dut‛ (% =,+ Hpprd`dlabkfltd ( =,8,+ B kdafiib V,Z,H, ab rfspdlshebibtã afi prdvbafr f i‒fvdiuzbdlf mburbspruaflzbhif ah Efthkhx h Mrdostfr   7,+ Fsbtb uitfrbdrb afiih vbjflah ’Sbrhtf Ehy‛ * 2,+ Srbljbphib rb`frbkfltb ( 

Upload: federico-costantini

Post on 03-Apr-2018

217 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 1/21

(%*! (%((%*

8,+ Srfkfssh> jdkulbjhzbdlf ’kditb 9+< kditb‛ f ’`bifsghrblm‛  

5,+ Jfllb hi `ulzbdlhkfltd afb sbstfkb pffr td pffr  :,+ Ih rfspdlshebibtã afii‒utfltf pfr vbdihzbdlf afi jdpyrbmgt lfi `bif sghrblm  1,+ Ih rfspdlshebibtã afi prdvbafr  

1,8,+ Ih mburbspruaflzh bthibhlh   1,5,+ Bi jhsd ’Qgf Sbrhtf Ehy‛  

6,+ Ahth rftfltbdl> bi jdl`ibttd trh jdpyrbmgt f abrbttd hiih rbsfrvhtfzzh afii‒utfltf (( 0,+ Jdljiusbdlb> ih absjdllfssbdlf jdkf ’ahklhtbd‛4 ih ifmbsihzbdlf `rhljfsf f bi sbstfkh ’ :+strbof+dut‛  (% =,+ Hpprd`dlabkfltd ( 

=,8,+ B kdafiib V,Z,H, ab rfspdlshebibtã afi prdvbafr f i‒fvdiuzbdlf mburbspruaflzbhif ah Efthkhx h Mrdostfr    7,+ Fsbtb uitfrbdrb afiih vbjflah ’Sbrhtf Ehy‛ * 2,+ Srbljbphib rb`frbkfltb ( 

Page 2: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 2/21

&-'"-."

( !&

/)!  +

),$.+-"-'"$$$)(!  38$$

!5 :*!  &5 $5.)1

$.)  680 83=5

8=3..$.7-")

3)  ,),)%(%%*!.

)  $.$.:

)  83353:)  833

$.33!:!  8$+-"

3$33:2!  $ .

>./?!9>$99!.8-"5-":

15$$3.

8);.$+$( ../?!$+..8  )

$833$$-"..7 )<5

!    $5==5:

(!  35$0-"

$$!:5$5!  9% 3:(!  3:

*!  33 :!  &-"-"

)&   $+

-")4$$-".5 .-")

,5C5-H3"-H3()%").$5$$)

Page 3: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 3/21

&-'"-."

*

  6-H3"8-'"!-"H3$EJ&!)5$+-"$.7$=.7=33)

  6-H3()%"-'".785$8  8!$5-")- ")

!&-'gttp>$$www,tbkf,jdk$tbkf$jdvfrs$3)80018)53308556)33,gtki"

-H3()%"8

!  !--:(!  !:

*!  !8),=.=+)-".-".-"$.8 3.

)

89A)?)/$F6H@3$F(.%.% $)(%%!M2G))

Page 4: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 4/21

9

/

  

==5.8)

' ". /

)(+,

-".

&EJ&5

)+$

1

.

&BJJ&:

3

8+ . -"

-" . - "

-"

)8+

3

N$?3$

H@$-

"$

3

$ . . -"-")

&-"+ .

EJ&)C8C-"%)

)))+ 1

3-("!+-."..$$$.!$-"-"$ -"5 8 . !),3-")$$$.58)

5$GM2)9)1)O)N..$F/E9)EJ&$FG!)$$I&I)O)/>$F/E9G2G)EJ&EJ&!$FGM2!)

:9)/)E)$F/E9(KK)B>LJ&BJJ&)$FGGG!)1$$>.7+!)

Page 5: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 5/21

9

, $.8)

,8 $8)J5$.

!  .$6 6$?!)

(!  ,-))!$

O$(!)-3":

*!  !DE$@>!)-")

5+3---.

"&80)

;..33NGK()

)+,$3 = 

66$3.HEGGG$$ 5 3)5 $A$

$33)0+5 , $8 %3+$.C55$.8 $.8.)3%3)

=&N$F4396H@$F385($+-- GK(!)

Page 6: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 6/21

,38>..

-

8 5-.: ;.  -"3

8)$5)

90.$3  ,((%%))-3"-"7)  ,*(%%22$..)

8% $..

)  8C-"3$C-"

35:  :  8C$$)

<$5.)&$C$$-"3)

,,,-**(1

H38+3GGG!.7.EJ&$)/ 8 ) 3 $ A 8$$3

$5$383S!)

&X))(M(%%%$..))K**G$X3HFF.FF)3)<$$3H.33EFEF!)

7),)(((%%)())$(*$)KG!$$$((%%$)(M 16

  %% 0$ = 7 % S

2),*(%%2)))$*$)(!)$$*(%%2$)*U(07$7$$7$%$0 S)

Page 7: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 7/21

,38>..

2

. 6 0=

6

'(%(-+3

U)>?0202$9

 /?$$??%;<4$  $00$;<4

7.-

?$"$0$0$0$0$6S

'(%3

U>%02  9%*$S)

'(%3

U?$

$$$$? $$ $?$%%$%%$$9$=%2$2$2$2?$2??$22$/% ?%%

6%?7?$9*$%9%$ C?%%C $7$ 0%%0007'"

'"80(H*$-S)

3 562/83

!2/7,>>/

2?

'(%( -+3

UE0$%0$??;<40-$%$   $000$S)

'(%( 8

UH9%97 S)

'(%((3

1?$ $ %$$$ >7'>68E"$9?H%?%0%

H 9%%97J

3

'(%-

3

U $9 $? >9%$9*$*$H S))

83;5)9),)((%%))-3"USUS)$),)(%%2USUS$)$C)

Page 8: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 8/21

,3

$8 % 3)$$33-"553353C.8C.-"-")8$.+)$-"3=5=330)

.C==)

,,,%-**918

9*X)K%%) ; $5$..$....$$5@$$05 X H$. :-

<4.?)

1$J3)N$(%G(%%M

,+..8

$.)

 5-.&53$!  >.)<+3

3$+3)5$

,,,1-**118%

XXX)()!3!=- .$F.F3$$X$ -CC)

(!  ,-$

5)5$3=83

=33 )

D$ 3 8  $.)

( 8J36MMGGK!$A

J3/GGM!)

Page 9: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 9/21

,3

!  E Z ? 9D (* (%% 9(*M(*(*M(%%M!$81Q4/$:

(!  ,84D3>9D((%9*((%%G!*!  ?V3J3/2(%G((%!$

-E"!:!  E1&1ZJJ3/%!.E&

1J3853)2!  &E1V1B44PJ1,1J3/((*!3  

>.@3-13D>"88)K!  V1B44PJ1,11,E1E,?4J3/])K(%!85$3

.@3):5-"58833),3.78)&C.7.555@)$$3

.)

 (%*!&&N>+$.7C

/$.8$)

U + , S + H3 3 . 8 8gttp>$$ tgfpbrhtfehy,drm$53>.)

,+)33.

.)

>':A:A)+%"

-" )<

$$==3-3")9

  (%%3!.@)  (%%8.-@"@

!E@6W-@"J1?4!)

88U9S(%(!)$)22$1)?W)85US(%(!)$)2$,)1)9)

Page 10: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 10/21

,3

  (%%K*!)5.)  (%%!&N>85)  (%%89,R

  (%%M23!-,N"(2)  (%%GK33!&N>8

>.)

  (%%G!3*8:)

  (%%!$3

  (%%M!&N>3.@)

  (%%(K3!$$:  (%(33!:  (%(J.&N>*:

  (%((%!9D8)%998D

  (%*G33!.3)6$$$$$$4$6$9$

$/)$CA

  ^(%%M5L)*(99&!3))&)J3N

6,H(**981

X$E

(%(-+88(1($X8-- !$53$.3))!$$:)

  (3(%%MJ3N5:

  9&/33J3N!

  (G3(%%G9)&))$)G*J3N)

,,,1-**118%

9XXX)()!3!H3.$ CC3$$X$3FF)

1$J3)3)N$(%G(%%M

  (33(%%J3N.5)

8:.@!$E@6WJ1?4!&3@!$9,$)

Page 11: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 11/21

>.8

9 -:,/.$83$

 5)9C+D9N(%%$+$5333  5-"$0$3)

5$+8+8 (K3(%%$F>8 =))&1=G3(%%(!-&"$),)(%%281!)

&5$

!  3$$.33$.33$8$$5.:

(!  38D$+$$886)

81),)((%%2)))$($)*!$$*(%%2$)22 @ :?8K(%%2U @?%6%$02$/$2$//$%$*$  S))(%%2$)G%!)ZJ)1)/),$((%%M$U88S(%%M!)MG1)J)$8=833=+8),)(%%2)$!8.83:(!8./-.33"$.H:*!8:!33-"81(8$

M8)%()!9)&)&)!33,)22(%%2!K(8)%()!9)&)&))

86),)GK(%%*$ (8!U 6%%%?C%$%$*6%%%%0$$9%$%%$$0%%%S:(89!)?0*$$%%%;?4%?$ %7$$%7$ %%$

?$%6$%$*E$?%%0$  $%% 6%0M$%70*?$%0$$%"%%'"/6@.$$%%%+>$.8%$=.-$$$2$$7$%%$7 $ %%$?$

%-2$%7 %6$$$ $M7.7%%/?6%.%9./$%.7..6%.%9

Page 12: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 12/21

>.8

3$+.

8$))-G"$3!)(%9&9$:

'(*/-

_Y)65CXMX $ $ _G)Y$CX3X5_K%)(Y)

_Y)6XX3$$X3_G2)Y)

_Y)X3$5..X3)

(!)2K3,)K**G$),)%(%%K 80$

8)

'(9-588J(1(

)<33533$.$C.X3..)&CA$.X3.)

()C.$

.$X33$.)

*)$X($$)

).)

),)GK(%%* !

8,)K**G$!$3.)

,.58$3)$$

. 7 .76.$ %C$.*-'"/??6/$??%$?$$6$%%6

%79%%002$??0$$="%%0"B"7$J

80),)K(%%K$)%$U 8//E7S)M((%%K!

Page 13: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 13/21

>.8

*

>-2(**

8.88L)2K3,))1) 5 8&.3/),8[>);3 : !

4;8=)

>-2(1**

&53[)2K2K3))K**G$.$9$3X)()$..F35$X..F9))(*)K)GG)(2*!) !;-A<

-$38)!$3.)2K2K3))K**G)

$.$.)

>-2(**%F!@87

X3.$FF$<CC--X.7X.!)$X

3)2K2K3))+3.FF.$75$X.!56M;4.)

>-2-**%

8=$J3/$).$)G33(%%$J3/$).$)2

(%%$J3/$).$)(%(%%$J3/$).$)(K(%%)87.$H$&   )J3/JK(%%!$QJ (%%K(%%*!$US(%%!)K$)2M2)

Page 14: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 14/21

>.8

/

&.$$ $$M-44$X3X)2K3)K**$X$X)())GK%* . . $ )3)2K2K

3))C3.FF.$75$3!.)6++3X)()))GK(%%*5.X.4)-+4$$&5)*$*(*)))GK(%%*!)

GB1**82

F!@,&9M(%%%$(%%%*9D$

X$$FF!$&9(((%%$(%%(G9D$XXX$&9(G(%%$(%%M9D$ $ & 9 ( (%%($(%%(2M9D$..!$ 3$ 5 $-- 44 )J$..$$334;-X)$$3$. 4$$$S)

>-2(%**

,X5$F.F$

$$4--CCCC $.$.$5 -. + 53)

829!(G(%%MI?)2?!&?\DT&!JcDT199(2%K!$)))D)9(((3(%%K)

53U88S(%%M!$)*M2)&3H)

Page 15: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 15/21

>.8

G--**

$338$ M- $5+58)

<+$) +, 55D-&.J"5:$5

!  1.U0C%%9S(!C.+3:

(!  855U369007 00%$?0%%07%+?$0S*3!.83$5.9)D)))3

:*!  ND/D9,%E3%E$4

.!$.:

!  1.U7%%$'$0%0N$7%$007S )( ($ ) 3!$ . 881&33 881C$$.8  )

. )9C)(+  ,35  )5$.

))1)>O+8 4&1!51$&/4JD9J&1$+3OE%%6+8 &&1!56)

?+8)K),)%(%%*1)9)K(*!$58-A:"50)

)+  .-"

 )56>+ 8 9&1!5=$8D9D)

58&$+)55,)23(%)())$((%($)!$(00067H $)%$&8(%%G*K9D&9$(23(%%G$(%%G%9D&9$(23(%%G$.)

5:/(%%G%9D(23(%%G(%%((9D.5$(%%(G9D8$8 (%%((%9D 

D,***M((%%G!)51&B)/)*(K!9(K3(%)56&NGKM!((%)50D$5>.$53338../)

Page 16: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 16/21

>.8

-

G6B,,,-*((%*J*(*F3BE3'3'H'"@

N--  :M-.9+A3.$ . 3.$FF$3.X!))

G6B,,,(--*(8*J(F3-J$$O@

,(%%%*9D&9$XM(%%%$X$$FF!:(%%(G9D&9$(((%%$XXX$(%%%M9D&9$(G(%%$

$33$ 4

:

..5:

:

$

$

$.5.$333$X)

>'225,,*((9

6+3$ $..$$FF$3$.733)5$55$.

53&(& X1 5 X $333X15$. M-4,!;-!!)

.333

-"57$&0)  88'8%8

5=19B)/)*2(*!$: 9 B)/) K(! 33 (%* 9 8).)

57351)?W)

Page 17: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 17/21

9-"h-*@"

2

"$$(%%K$33Q@@(%%M!.+83(%8D(K(%(J@52)819J1+833$.)

 I"

+ >. 8$885)

E$(%%G$+.!  B14&)2!$.:(!  63:

*!  833 )!:!  -*@"

)  8

3)  K1/!

)  ) 

)  (()  3

)  ()  0

J+.3:3)

,8+

! D?J&!(! 

*!   8$:!  -" -+"?,.$-

+"h

52&(%(.8):399E$%(%%G$)2M%$-E"$Z$().,*(%%G

Page 18: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 18/21

1

% '

%( (./)/+/',&$0"+3   $5$+.-"),)%(%%*)

  +=5.3=+33..$5+-")

15$+8$.7.==5.)

"* 3- -- O-

0 /3 $8) 13+...3 8:5 8 3 .!)

<3C 3 X$8)(%G99$3)

!

5+3$5+

D::)

B

D:1 3:6

93:0

N*

&>3>D)E:7

6 *G

1 %

933>918

D,)?.15

>61:

*9)EZ,.$3 www,f``,drm-IA::  "$))&.X@W:)?44,D$67 $U93S(%%!($)*2:) &D91J4$H7G  . $U93S(%%*!$)G2)

:5<$- % "$?91$$.)

::U% S:1OHU % A: % % %:%A:%$A:%8$:$%%%%K%%%%$%$ S)

:6/.13>9U%%)G$5%A:! S)

:0?93U%%

@!%&A%:%:A%!& S)*ENU%!%%&%%6$:$%!&!%&K%)G$5%!%%G:%%:%&:$$A S)

Page 19: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 19/21

1

;..3

33),-,G"->%F ")63-9NL"$

3-"=.=.733

>.

)$3+.)<3  $$' )

<$ $C.!3H $

.33$533$)

(!1$C.)<' $C.

!+5X)(!.X3

  $$53. )

&GK 2$.6$C3

!  &:(!  K>.:*!  98:

53 -.>"$.  $5=17)

:7&>3>D)) E$M*GE))22($22G?))EGG*!), 3 33)*G1e?/)6$(*GE)*%%G.9)(%%!)63.)%19>.,$**E)*K*.9)(%%*!)18D3.73!15

D,))?.$M2E))KG6))9GG!),33.3)1:D3.753)>)9>$K))GM!U%?$A%%$%%:%$L6$)S

16??)@$(2)9)(K(%%2!),9+((%%2)10U%::

$::::%)G$::A$:%%:%$::%8%A:!$&:$:

::$% S)1=11UA%

EG%%%%%$:%': "$ !& %6 %%%'$%5"S)

Page 20: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 20/21

D-&N>"

 B!H;.-"-"

  !)-&&"(%%G$j==&D 12:.(%(8M)*j.HB$2j6/Z!-E"63:

  '$NZ(%%G-3")

gttp>$$fkehssyd`pbrhjy,drm$ 

  2UJ./.N>S$8,

./68)

<-"8-")D$3-"A $.$.),-")C8

)

171/,,9),,,9$2E))(M(%%!)(%%(2(%%),8(K3(%%)

12 1 1 (* ! 9. DR 2 !) 1 8-&&")(%1$-"$0)

63.)H@)H@&a&>f&a&>aaHH68gttp>$$pultd+bl`drkhtbjd,bt$:8:7352$SB$Lfws$tgf+pbrhtf+ehy+ul+mbdrld+hii+ulbvfrsbth,hspx

Page 21: Lezione 10 17-4-2013 PeerToPeer

7/28/2019 Lezione 10 17-4-2013 PeerToPeer

http://slidepdf.com/reader/full/lezione-10-17-4-2013-peertopeer 21/21

&

1 !

N$&)F4396H@)F385($+-- $GK()

N..$1)O)F/E9)EJ&)FG)

E$/)$)9)$I)>$I)9)?$B)E>>@$,)?$&),.$JN,)F/E9(KK)B>LJ&BJJ&))FGGG)

&$I$I)O)/>)F/E9G2G)EJ&EJ&!)FGM2)

/$)?)F6H@3)F(.%.%$)(%%!M2G)