Network Programming Wikiclass | Tutorial / Domain Name System

Introduction: You will do some activities to learn more about DNS and the Interent.

Activity One

(Q1) How many top-level domains are there?

(Q2) How many top-level domains are belonging to country code?

Do a little research to find the information of all the name servers for country-code top-level domain designated for Hong Kong.
The information includes hostname, IP address, and the physical location.

(Q3) List the details of the servers: hostname, IP address, and location.

(Q4) How do you use this DNS traversal checker to verify your findings?

You can use the Name Server Lookup (NSLOOKUP) command to query the Domain Name System for information about domain names and IP addresses.
Launch the nslookup command-line tool on your PC.
Use NSLOOKUP to find the following answers:

(Q5) What is your default DNS resolution server?

(Q6) How do you change the DNS server for your DNS query?

(Q7) Use the default DNS server to find all the name servers for the domain ouhk.edu.hk.

(Q8) Set the DNS resolution server to be 8.8.8.8. Then, find all the name servers for the domain ouhk.edu.hk.

(Q9) Are there any differences in your answers to (Q7) and (Q8)? Try to explain the results.

(Q10) Find a list of message transfer agents (MX records) for the domain ouhk.edu.hk.

Find a domain that you are interested in.
Find the IP address of Web server for that domain.
Find the name server for that domain.
Find the email server for that domain.
Find the people who registered that domain.
Based on these information, explain if you can figure out the web hosting company for that domain.

(Q11) Report your findings in answering the above questions.