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Statics (ENGR 2301 ) 5.3.2.8 Packet Tracer

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Sandra Watson
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Texas College

Statics (ENGR 2301 )

Objectives
Part 1: Examine an ARP Request
Part 2: Examine a Switch MAC Address Table
Part 3: Examine the ARP Process in Remote Communications
Background
This activity is optimized for viewing PDUs. The devices are already configured. You will
gather PDU information in simulation mode and answer a series of questions about the data
you collect.
Part 1: Examine an ARP Request
Step 1: Generate ARP requests by pinging 172.16.31.3 from 172.16.31.2.
a. Click 172.16.31.2 and open the Command Prompt.
b. Enter the arp -d command to clear the ARP table.
c. Enter Simulation mode and enter the command ping 172.16.31.3. Two PDUs will be
generated. The ping command cannot complete the ICMP packet without knowing the
MAC address of the destination. So the computer sends an ARP broadcast frame to
find the MAC address of the destination.
d. Click Capture/Forward once. The ARP PDU moves Switch1 while the ICMP PDU
disappears, waiting for the ARP reply. Open the PDU and record the destination MAC
address. Is this address listed in the table above? No____________________________
e. Click Capture/Forward to move the PDU to the next device. How many copies of the
PDU did Switch1 make? 3_________________________________________________
f. What is the IP address of the device that accepted the PDU? 172.16.31.3____________
g. Open the PDU and examine Layer 2. What happened to the source and destination
MAC addresses?
Source became destination, FFFF.FFFF.FFFF turned into MAC address of
172.16.31.3____________________________________________________________
________________________
h. Click Capture/Forward until the PDU returns to 172.16.31.2. How many copies of the
PDU did the switch make during the ARP reply? 1______________________________

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Statics (ENGR 2301 ) 5.3.2.8 Packet Tracer

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