= Challenge Handshake Authentication Protoco =
##Įrašykite terminą anglų kalba
== CHAP ==
##Jeigu yra įrašykite Santrumpą
== Iššūkio rankos paspaudimo autentifikaijos protokolas ==
##Įrašykite lietuvišką termino vertimą
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== Apibrėžimas ==
##Suformuluokite termino apibrėžimą
CHAP autentifikavimo protokolas (Challenge Handshake Authentication Protocol) naudojamas periodiškai tikrinti mazgus vieno lygmens, kurie palaiko (handshake). Tikrinimo procedūra atliekama sujungimo metu ir gali būti pakartota bet kurio laiku.



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== Paaiškinimai ==
##Plačiau paaiškinkite terminą, juo nusakomo objekto svarbą, veikimo principą ir tt.
CHAP paketo struktūra.



||<tablestyle="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-yfti-tbllook: 1184; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt" tableclass="MsoTableGrid"rowstyle="mso-yfti-irow: 0; mso-yfti-firstrow: yes"^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: black 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: black 1pt solid; WIDTH: 123.15pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1">Kodas ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: black 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.15pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1">Identifikatorius ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: black 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1">Dydis ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: black 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1">Duomenys ||
||<rowstyle="mso-yfti-irow: 1; mso-yfti-lastrow: yes"^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: black 1pt solid; WIDTH: 123.15pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-top-alt: solid black .5pt; mso-border-top-themecolor: text1">1B ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.15pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1; mso-border-top-alt: solid black .5pt; mso-border-top-themecolor: text1; mso-border-bottom-themecolor: text1; mso-border-right-themecolor: text1">1B ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1; mso-border-top-alt: solid black .5pt; mso-border-top-themecolor: text1; mso-border-bottom-themecolor: text1; mso-border-right-themecolor: text1">2B ||<^ width="164px" style="BORDER-RIGHT: black 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #f0f0f0; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #f0f0f0; WIDTH: 123.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: black 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid black .5pt; mso-border-themecolor: text1; mso-border-left-alt: solid black .5pt; mso-border-left-themecolor: text1; mso-border-top-alt: solid black .5pt; mso-border-top-themecolor: text1; mso-border-bottom-themecolor: text1; mso-border-right-themecolor: text1"> ||




Kodas – identifikuoja CHAP paketo tipą. Gali būti tokie tipai:

1.   Challenge (iškvietimas, patikrinimas)

2.   Response (atsakymas)

3.   Success (patvirtinimas)

4.   Failure (atsisakymas)

Identifikatorius – papildoma identifikacija priklauso nuo paketo tipo.

Dydis – viso CHAP paketo dydis.

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== Naudota literatūra ==
##Pateikite naudotos literatūros sąrašą
1. http://www.protocols.ru/files/Protocols/PPP.pdf

2. http://en.wikipedia.org/wiki/Challenge-handshake_authentication_protocol

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