DNS LAB

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1. Open Packet Tracer
2. Go to File, Open Samples, Server, DNS, Multilevel_DNS.pkt & open this configuration file
3. Follow the instructions on the Packet Tracer file screen.
4. Make notes concerning the path taken by the information requested by DNS client.
5. Open the authority.example.com server and open the Config tab to view the DNS server details.
6. Examine the existing records and make a note of the record types.
7. Carry out research to work out the difference between the DNS record entries. These are A Record, CNAME, SOA, NS Record.
8. View the DNS server entries for the Local DNS Server. Which two record types are present?
9. Which IP address is specified in the Local DNS Server DNS records? Where is this machine? What is its name and purpose?
10. Which of the TLD names is the Local DNS Server pointing to?
11. Open the Client PC browser and view where the DNS packets are being directed to for the domain name www.unknown.com (you may need to adjust the filters in the simulation pane to show just the DNS, TCP and HTTP packets). Which of the DNS servers does the DNS request travel through?
12. Now view where the DNS packets are being directed to for the domain name www.unknown.org
13. Is this the same path as in step 11 above? Explain the outcome of step 13.
14. How would you change the behaviour of the DNS system to operate in a similar fashion to step 11?
15. Add a new NS record to the Local DNS Server.
The information is
Name: org
Type: NS Record
Server Name: root
16. Observe the path of the DNS packets now. Has this changed?
17. What is the IP address of the root server in the network?
18. It has been decided to add the alias www.example.org to access the same web page as www.example.com
How would this be accomplished? Think of the record type that will need to be added. Which server should this be added to?