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2.1.1 Bảo mật của giao thức PPTP
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-V-[•W !eWa"T%W(tTUcV-C-™UHWEaEW'V-i%[•W !eTU
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a#"-jTV!WB[B-'V-TV!-Y;;;W,-#.[#f !i•-V-vxX–-V-_#
]€X#. ;;;[d-_[Hw-W"TUXH?#TV!WB-V„jh-W&W#[•D-‚Waj_#
;;;'2H –a•-V-_#W#;;;[__#-_Wd-\D]€X#. H[D#DjW\-;Ž;C
;›jh--V-#DjW\-EW‡/'~#`lTV!-Y;;;[Hw--n l[d#DjW#e@Wa"
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[D#DjW\-'
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Wa"TUWH„'
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]#(D((ETiXE(]DWDaDT;`jT%W_#;;;`(D [_#$#T’-V-_#W#;;;i•-V-
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5@ T.])0
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#-aj(j”WC-_WdceWt#[eTV!-Y;;;WEjD#-V-
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[e;;;'
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
V-;;;(x]^TV!-YWa !-k@TU-YDT%W+;@$#[Hw--n
l`?#T%WTj]ET`T%WW#eWi•;[dXT-j-V-ceWt#a#"i#.W[d-V-+;`
TV!-Y;;;'
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;;;2>[Hw-[hWWa"-V-@HIW#.Wa !fW&`?#D]D@WEaTU`kWX–'
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&'()*@ ^_-`a
3.1 F&J)&0<.=)K&?.0&b7)*&.1I
3.1.1 Mô hình của PPTP
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3.1.2 Các phần mềm thực hiện
y—#+Ea`Ea644:
y—#aE+aDc
yj WEa
)* ;DE 

@5 ;7P'/77c.Wd0
#:'6hW;-j+Ea`Ea
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
#:':#e@W^-[hW;-jX#EW
)* ;DE -
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l:'Ÿa !-k@`j;-YDj WEa
)* ;DE C


l:'LƒW[r >j WEa`WU#WaHZ+Ea`#-E-m#DjW\-X;;;`-|`?#
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