On a Mac:$1.$ In a terminal window$/$shell enter the following command:$\%$ sudo ipconfig set en$0$ noneWhere en$0($in this example$)$ is the interface on which you want to capture packets using Wireshark. You can easily find the list of interface names in Wireshark by choosing Capture$->$options. This command will de$-$configure network interface en$0\mathrm{.}2.$ Start up Wireshark, capturing packets on the interface you de$-$configured in Step $1\mathrm{.}3.$ In the terminal window$/$shell enter the following command:$\%$ sudo ipconfig set en$0$ dhcpThis will cause the DHCP protocol to request and receive an IP address and other information from the DHCP server. $4.$ After waiting for a few seconds, stop Wireshark capture. On a Linux machine:$1.$ In a terminal window$/$shell$,$ enter the following commands: sudo ip addr flush en$0$ sudo dhclient $-$r where en$0($in this example$)$ is the interface on which you want to capture packets using Wireshark. You can easily find the list of interface names in Wireshark by choosing Capture $->$ Options. This command will remove the existing IP address of the interface, and release any existing DHCP address leases. $2.$ Start up Wireshark, capturing packets in the interface you de$-$configured in Step $1.3.$ In the terminal window$/$shell$,$ enter the following command:sudo dhclient en$0$where, as with above, en$0$ is the interface on which you are currently capturing packets. This will cause the DHCP protocol to request and receive an IP address and other information from the DHCP server. $4.$ After waiting for a few seconds, stop Wireshark capture. On a PC:$1.$ In a command$-$line window enter the following command:$>$ ipconfig $/$releaseThis command will cause your PC to give up its IP address$\mathrm{.}2.$ Start up Wireshark$\mathrm{.}3.$ In the command$-$line window enter the following command:$>$ ipconfig $/$renewThis will cause the DHCP protocol to request and receive an IP address and other information from a DHCP server. $4.$ After waiting for a few seconds, stop Wireshark capture. NOTE: Filter by DHCP if needed Answer the following questions below: DISCOVER $(1$ point each$)1.$ Is the DHCP Discover message sent out using UDP or TCP as the underlying transport protocol?$2.$ What is the source IP address used in the IP datagram containing the Discover message? Is there anything special about this address? Explain$\mathrm{.}3.$ What is the destination IP address used in the datagram containing the Discover message. Is there anything special about this address? Explain. OFFER $4.$ How do you know that this Offer message is being sent in response to the DHCP Discover message you studied above?$5.[2$ points$]$ What is the destination IP address used in the datagram containing the Offer message? Is there anything special about this address? Explain. $[$Hint: Look at your trace carefully. The answer to this question may differ from what we discussed in class. To answer consult DHCP RFC$,$ page $24.]$ REQUEST $6.$ What is the destination IP address used in the datagram containing this Request message. Is there anything special about this address? Explain$\mathrm{.}7.$ What is the value in the transaction ID field of this DHCP Request message? Does it match the transaction IDs of the earlier Discover and Offer messages? ACK $8.$ For how long a time $($the so$-$called lease time$)$ has the DHPC server assigned this IP address to the client?$9.$ What is the IP address $($returned by the DHCP server to the DHCP client in this DHCP ACK message$)$ of the first$-$hop router on the default path from the client to the rest of the Internet?