Question

Duplicate IP addresses t possible for more than one ork with someone eise and set both computers to have the same IP address Gust change computer to have the same IP address? me of them to match the other tart a Wireshark packet capture on both computers so you can watch the actual packet raffic under these conditions a) Observe what happens when the computers with identical addresses try to ping each 5. Duplicate IP addresses a) Are the ping packets successfully sent and received? Describe the packets captured during the pings other b) Have a third computer ping the duplicale address and observe what happens 6. Script to restart the NIC Restarting the NIC is going to be a common operation in a number of upcoming lab assignments. The commands to do this are Ifdown to disable it followed by ifup to enable t again. Having a script to do this saves typing (and typos). Create a file in your home directory with the following commands: Describe where you think the request and reply ping packets are going sudo ifdown enpes sudo ip addr flush dev enpes sudo Ifup enpes3 ifconfig (The first three commands restart the interface and the last Save the file and make it executable b) Describe what happens when a third computer pings the duplicate IP address. Currently, the VMs interface is configured available yet. So before sesting the new script, edt the configuation ie /etc/network/interfaces as root. Change (use your PC number in place of x) to get its IP address from a server but none are on file the last line and add another line as follows iface enpes3 inet static 6. Script to restart the NIC address 192.168.18.x Now run the script to reset the interface and observe the results Show the command you used to restart the interlace:

Answer 1

5) a) Ping will not be successfull if there is a duplicate IP address. The computers are disconnected from the network when both machines have duplicate address which is also called ip conflict in windows. Request of ping will not be going to both the computers.

When a ping is happened between computers the arp protocol is used to resolve mac address with the IP. So when IP conflicts happens the packets are not gone outside the computer because both the machine will respond with same IP Address.

The packet will hold both the mac address of duplicate ip address computers.

b) The third computer cannot ping the computers which are having same IP address. Because the arp is not updated for the duplicate ipaddress computers.