Remote LAN Network Topology
Background/Scenario
Packet Tracer allows the design and creation of a simulated networking topology. In this activity, youare presented with a simplified topology to observe packet flow. You will explore how packets travel through the network using the simulation mode in Packet Tracer. You will also observe the changes in packet flow when there is a change in the network topology.
In this part, you will use the simulation mode in Packet Tracer to observe how packets flow through a
remote LAN network.
a. Switch to Simulation mode (Shift + S). Click Show All/None to clear all the selected
event list filters.
b. Click Edit Filters. Select DNS under the IPv4 tab and HTTP under the Misc tab.
c. Open a web browser on PC0. Enter www.web.pka and press Go.
Predict the packet path to resolve www.web.pka to an IP address. Record your
prediction.
DNS packets: PC0 > Wireless Router0 > Cable Modem0 > Cloud0 > Router5 > East >
Switch0 > Switch1 > Public DNS and reverse the path back to the originator PC0.
d. Click Capture / Forward until the webpage is displayed on PC0 to view the packet
flow. Click View Previous Events when prompted by the Buffer Full dialog box.
After the IP address has been resolved, which path did HTTP packets travel to display
the webpage? Record your observations.
DNS packets: PC0 > Wireless Router0 > Cable Modem0 > Cloud0 > Router5 > East >
Switch0 > Switch1 > Switch2 > www.web.pka and reverse the path back to the originator
PC0.
e. Switch to Real time mode (Shift + R). Click the X icon in the right tool panel to select
the Delete tool. Remove the link between Switch0 and Switch 1 from the Public
Network to simulate a broken link. After 30 seconds, the network will learn of the broken
link. You can click Fast Forward to speed up the process.
f. Select the Arrow tool above the Delete tool to de-select Delete.
g. Switch to Simulation mode (Shift + S). Open a web browser in Tablet0 and navigate
to www.web.pka. You can click Auto Capture/Play to have Packet Tracer forward the
packets without your interaction. You can also move the Play Slider to the right to
speed up the packet forwarding.
h. With a broken link in the LAN, how did the path change? Record your observation.
It went through Switch 0 > Switch2 > Switch1 to reach Public DNS server.
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