This commit is contained in:
Ulf Gebhardt 2012-10-22 14:05:51 +02:00
parent 4f4ff0b16a
commit 722d4e4701
6 changed files with 409 additions and 0 deletions

View File

@ -0,0 +1,349 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:y="http://www.yworks.com/xml/graphml" xmlns:yed="http://www.yworks.com/xml/yed/3" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
<!--Created by yFiles for Java 2.9-->
<key for="graphml" id="d0" yfiles.type="resources"/>
<key for="port" id="d1" yfiles.type="portgraphics"/>
<key for="port" id="d2" yfiles.type="portgeometry"/>
<key for="port" id="d3" yfiles.type="portuserdata"/>
<key attr.name="url" attr.type="string" for="node" id="d4"/>
<key attr.name="description" attr.type="string" for="node" id="d5"/>
<key for="node" id="d6" yfiles.type="nodegraphics"/>
<key attr.name="Beschreibung" attr.type="string" for="graph" id="d7"/>
<key attr.name="url" attr.type="string" for="edge" id="d8"/>
<key attr.name="description" attr.type="string" for="edge" id="d9"/>
<key for="edge" id="d10" yfiles.type="edgegraphics"/>
<graph edgedefault="directed" id="G">
<data key="d7"/>
<node id="n0">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="104.125" y="0.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="16.76171875" x="17.619140625" y="12.93359375">"."<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n1">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="36.0" y="84.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="18.23828125" x="16.880859375" y="12.93359375">de<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n2">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="172.25" y="84.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="23.763671875" x="14.1181640625" y="12.93359375">org<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n3">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="39.0" width="93.0" x="15.5" y="168.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="82.4453125" x="5.27734375" y="10.43359375">tu-darmstadt<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n4">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="128.5" y="168.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="26.376953125" x="12.8115234375" y="12.93359375">gnu<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n5">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="83.0" x="200.5" y="168.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="59.083984375" x="11.9580078125" y="12.93359375">wikipedia<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n6">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="83.0" x="20.5" y="247.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="64.41015625" x="9.294921875" y="12.93359375">informatik<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n7">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="128.5" y="252.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="27.66015625" x="12.169921875" y="12.93359375">lists<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n8">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="216.0" y="252.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="18.23828125" x="16.880859375" y="12.93359375">de<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n9">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="72.0" y="331.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="15.501953125" x="18.2490234375" y="12.93359375">tk<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<node id="n10">
<data key="d4"/>
<data key="d5"/>
<data key="d6">
<y:GenericNode configuration="BevelNode3">
<y:Geometry height="44.0" width="52.0" x="0.0" y="331.0"/>
<y:Fill color="#FFFFFF" transparent="false"/>
<y:BorderStyle color="#000000" type="line" width="1.0"/>
<y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="26.693359375" x="12.6533203125" y="12.93359375">p2p<y:LabelModel>
<y:SmartNodeLabelModel distance="4.0"/>
</y:LabelModel>
<y:ModelParameter>
<y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
</y:ModelParameter>
</y:NodeLabel>
</y:GenericNode>
</data>
</node>
<edge id="e0" source="n0" target="n1">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-12.59425426664805" y="17.9951171875"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e1" source="n0" target="n2">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="19.83830188569567" y="17.9951171875"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e2" source="n1" target="n3">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.993408203125"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e3" source="n3" target="n6">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.960693359375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e4" source="n6" target="n10">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-5.703404017857146" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e5" source="n6" target="n9">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="11.417689732142847" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e6" source="n2" target="n4">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-7.361775716145843" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e7" source="n2" target="n5">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="13.445109049479157" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e8" source="n4" target="n7">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
<edge id="e9" source="n5" target="n8">
<data key="d8"/>
<data key="d9"><![CDATA[UMLimplements]]></data>
<data key="d10">
<y:PolyLineEdge>
<y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
<y:LineStyle color="#000000" type="line" width="1.0"/>
<y:Arrows source="none" target="none"/>
<y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.974609375"/>
<y:BendStyle smoothed="false"/>
</y:PolyLineEdge>
</data>
</edge>
</graph>
<data key="d0">
<y:Resources/>
</data>
</graphml>

Binary file not shown.

After

Width:  |  Height:  |  Size: 13 KiB

Binary file not shown.

Binary file not shown.

Binary file not shown.

View File

@ -0,0 +1,60 @@
#h1.1
a)
org -> gnu.lists
wikipedia.de
de -> tu-darmstadt.informatik -> p2p
tk
b)
Die Serverbelastung wäre sehr groß wenn alle DNS Anfragen
von einigen wenigen Servern beantwortet werden müssten.
Aus diesem Grund gibt es eine hirachiche Ordnung, die die
Zuständigkeit zur beantwortung der DNS Anfragen regelt.
So ist in der Regel jede Domain für seine Subdomains
verantwortlich.
#h1.2
a) Ein RFC definiert einen Internet-Standart oder Quasi-Standart.
Aprillscherze ausgenommen, wird unerteilt in
Informational Hinweis, Idee, Nutzung, Mitteilung an die Netzgemeinde
Experimental zum Experimentieren, Anfangsstadium eines potenziellen Standards
Proposed Standard Vorschlag für Standard
Draft Standard Begutachtung von mindestens zwei unabhängigen Implementierungen
Standard offizieller Standard STDn
Historic nicht mehr benutzt
Früher eher als Diskussionsplatform(Request for Comment) genutzt heute eher
als Regelwerk zu verstehen.
b) Da die in RFC beschriebenen Protokolle allgemeingültig sind und
alleine aus einem RFC zu konstruieren sein müssen ist eine eindeutige
Sprache wichtig, damit jeder den Beschreibungstext auf die gleiche
weise verstehen kann. Vergleiche: Recht -> Gesetze.
#h1.3
a) Zyklen lassen auf eine Gruppe von Kursen schließen, die sich mit dem
selben oder ähnlichen Themengebiet beschäftigen.
b) Ein Kurs mit vielen ausgehenden Kanten ist ein Grundlagenkurs, da er
Grundlage für viele andere Kurse ist.
c)
Mathe,
FGDI 1-3
#h1.4
a) 0.9^6 -> 0,531441
0.9^12 -> 0,282429536481
b) 2/20 = 0.1 = snitch
0.9^6 = 0.531441
c) 2/20 = 0.1 = snitch
6 = Übertragungen
0.9 = successchance
(0.9*0.9)^6 = 0,282429536481 -> entspricht dem langen Weg ohne Spitzel