Transcript Molecular Evolution

Chapter 21
Network Basics for Digital Investigators
©2011 Eoghan Casey. Published by Elsevier Inc. All rights reserved.
FIGURE 21.1 Map of ARPANET.
Figure 1.1
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FIGURE 21.2 Timeline of key events.
Figure 1.1
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Figure
1.1to form a network.
FIGURE 21.3 Depiction of hosts with NICs connected
to a router
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1.1
FIGURE 21.4 Hosts connected to a central hub (starFigure
typology).
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Figurecommunication
1.1
FIGURE 21.5 Normal FDDI communication versus backup
when a host is down (double-ring
typology).
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FIGURE 21.6 Wireless IEEE 802.11 network with a Figure
PDA and 1.1
PC connected to an AP. Also shown is the AP
connected to the Internet.
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FIGURE 21.7 Dissimilar networks connected using aFigure
common1.1
language to form an internet.
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FIGURE 21.8 Barbara the Bookie’s Network.
Figure 1.1
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Figure
1.1 communication between modules.
FIGURE 21.9 Conceptual depiction of TCP/IP with arrows
indicating
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Figure
1.1
FIGURE 21.10 A simplified depiction of the Open System
Interconnection
layers showing where TCP/IP fits.
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Figure
1.1 traffic relating to a single flow being extracted
FIGURE 21.11 A conceptual representation of packets
in network
and reconstituted to obtain the data they carry (Casey, 2004).
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Figure
1.1
FIGURE 21.12 Graphical synopsis of the OSI reference
model.
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Figure
FIGURE 21.13 How a Web browser accesses the Internet
as 1.1
seen through the OSI model.
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Figure
1.1 components of a Web page both in OSI layers
FIGURE 21.14 NetIntercept (http://www.sandstorm.com)
showing
and content recovered from network traffic.
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