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    Windows Networking: Commands explained

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    I desperately need assistance on the questions below which some of them requires using the the command prompt. I would like to have the answer with the detail step by step commands. Thank you!

    1. Find all the mail servers for yahoo.com:
    2. Find all the DNS servers for Microsoft.com
    3. If you can reach a remote machine by IP, but not by name, what conclusion can you make?
    4. List the steps that you use to trouble your DNS issue in the client side?
    5. How do you specify a particular DNS server to make a query?
    6. If you make a DNS query and get a message "query refused", what can you conclude?
    7. How can you know DNS server running on a machine?
    8. How to get maximum information when you make DNS query?
    9. List your NetBIOS cache information
    10. Give a command which uses NetBIOS name resolution.
    11. Find the NetBIOS information for a remote machine.

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    Solution Preview

    I am Leela Krishna from India. I am happy to help you with the questions.

    I am able to find answers to ALL the question and you will be able to understand them very easily if you try to run the same yourself.

    If you have any queries feel free to contact me.

    All the best for your future.

    Leela Krishna

    ====================== Answer Starts =======================

    1. Find all the mail servers for yahoo.com:

    To find Mail Servers of yahoo.com
    i.e we have to lookup for MX records (Mail exchanger records) in the DNS server.

    (For this we run nslookup in Interactive mode, i.e., we just run nslookup on command

    prompt and give the command on the nslookup shell)
    Default Server: <default server in the network>
    Address: <address of default server>

    > set type=MX
    > yahoo.com
    Server: <dns servername>
    Address: <dns server IP address>

    Non-authoritative answer:
    yahoo.com MX preference = 1, mail exchanger = b.mx.mail.yahoo.com
    yahoo.com MX preference = 1, mail exchanger = c.mx.mail.yahoo.com
    yahoo.com MX preference = 1, mail exchanger = d.mx.mail.yahoo.com
    yahoo.com MX preference = 1, mail exchanger = e.mx.mail.yahoo.com
    yahoo.com MX preference = 1, mail exchanger = f.mx.mail.yahoo.com
    yahoo.com MX preference = 1, mail exchanger = ...

    Solution Summary

    Solution clearly provides the details of commands that need to be run from windows to collect critical network related information like Mail Server, DNS server, NETBIOS name, etc with example.