![]() Save the capture file as YourLastName_HOL4-DNS.pcapng and upload it with this completed worksheet. ![]() What is the delta between the query time and the query response time?ĭo you think the delta time is acceptable? Why? Why not? What is (are) the resolved IP address or addresses for the URL? Visit (Links to an external site.)Links to an external site.ĭetermine how many DNS requests in the packet capture are related to that URL. Restart Wireshark and apply a capture filter for DNS traffic (hint* apply a filter for the ports that DNS uses). ![]() Save the capture file as YourLastName_HOL4-DHCP.pcapng and upload it with this completed worksheet. What DNS server(s) were offered along with the lease?įrom the first to the last packet used during the DHCP Discovery process, how much time elapsed? ![]() What is the lease duration for the IP address that was offered? As shown in Figure 1, enter ipconfig /release. Begin by opening the Windows Command Prompt application (which can be found in your Accessories folder). What is the message type value for each DHCP message present in the capture? In order to observe DHCP in action, we’ll perform several DHCP-related commands and capture the DHCP messages exchanged as a result of executing these commands. What DHCP messages are present in the capture? Determine how many messages related to the renew command are in the packet capture. tcp.port 80 - this will display un-encrypted TCP traffic on port 80. Start Wireshark and apply a capture filter for DHCP traffic (hint* apply a filter for the ports that DHCP uses).įrom a command prompt run the ipconfig /release command and then run the ipconfig /renew command. dhcp - will display DHCP packets (if you are using an old version of Wireshark you'll need to use bootp) dns - will display DNS packets Both tcp and udp can be extended even more to include the particular ports that are being used to communicate.
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