Question: Using a Protocol Analyzer to Troubleshoot DNS Time Required: 30 minutes or more Objective: Troubleshoot DNS by capturing the packets in a DNS query. Required Tools and Equipment: Net-XX Description: This lab can be done in groups. First, capture packets involved in DNS queries, and determine the queries generated by your computer and the responses from the server. Next, capture only DNS packets, and use ns lookup to query www.yahoo.com and www.yahoo-xyz.com. Answer the following questions:
• What packet-capture filter did you use? For each lookup, answer these questions:
• Did your computer generate more than one DNS query for each lookup? If so, why?
• What was the response from the DNS server for each query?
• Was more than one IP address returned? If so, why?