INST 346
Technologies Infrastructure and Applications
Fall 2017
Assignment L4

1. First, launch Wireshark and then connect to a network. If were already connected to the network before starting wireshark, then disconnect from the network and then reconnect after starting Wireshark. You can use a wired or a wireless network for this assignment, but it has been tested only on the university's umd wireless network so if you use any other network and have problems, try that one. Set Wireshark up to display DHCP packets by entering "bootp" as a filter (DHCP packets are carried by the BOOTP protocol) and examine the sequence of DHCP packets to determine the IP address of the DHCP server, the IP address that is leased to your computer, and the IP address of the Default Gateway that is assigned to your computer. Report those three IP addresses (properly labeled) as the answer to this question, and include one or more Wireshark screen shots that show where you found this information in Wireshark.
2. Next, find the Ethernet MAC address of your computer. An easy way to find this in windows is to launch a command window and then type ipconfig /all. On a Mac, you can launch a terminal window and then type ifconfig. Report your MAC address as the answer to this question and include a screen shot (of the command or terminal window) to show where you found this information.
3. Finally, set wireshark up to display ARP packets by entering arp as a filter (remember, filters are always lower case) and then examine the sequence of ARP packets to discover the Ethernet MAC address of the default gateway. Report that Ethernet MAC address as the answer to this question, and include one or more Wireshark screen shots to show where you found this information.