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DNS questions (basic questions, easy to answer)

post #1 of 5
Thread Starter 
Ok, believe it or not, I fail at Google. I Google'd these questions and only came up with a few of the answers for my worksheet after 20 minutes so now I have a few left I need help with. Should be pretty simple for most of you to answer.

1. Explain the purpose and location of a DNS resolver
(location between domains or something I'm guessing)

2. Explain the usual location of the first DNS server used in the look up process, as explained and illustrated in the second reference above. (no actual reference suppiled lol )

But yea, other than those i got the other 5 questions done Thanks to anyone who helps.
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post #2 of 5
1. The purpose of a DNS resolver is to be able to be able to resolve a host address, location and gateway, the local from the DNS server also increases the speed depending on the distance from client to server, so the closer the DNS the faster overall pefformance.

I cant help ya with two as I am far too lazy now.
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post #3 of 5
this is the only thing i could find
Quote:
The DNS database resides on a hierarchy of special database servers. When clients like Web browsers issue requests involving Internet host names, a piece of software called the DNS resolver (usually built into the network operating system) first contacts a DNS server to determine the server's IP address.
If the DNS server does not contain the needed mapping, it will in turn forward the request to a different DNS server at the next higher level in the hierarchy. After potentially several forwarding and delegation messages are sent within the DNS hierarchy, the IP address for the given host eventually arrives at the resolver, that in turn completes the
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post #4 of 5
Thread Starter 
Thanks for the first one atleast guys. I guess I can get the other two off of my friend if he ahs them.
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post #5 of 5
This might be a little late but for education purposes. The first dns server a request hits is either a dns server on your network or the dns server at your ISP. After that, if the dns server does not have the information cached to process your request it passes it on to a higher level dns (The query may go as high as a "top-level domain name DNS server, which are usually found at the major internet providers, UUNet etc.) sequentially until one of two things happen; either it will find a dns server that is authoritative that knows where the information is exactly and process a request completely or it will send a back a negative response. Generally these dns servers (The first dns servers you hit...)are setup to be "recursive" and assume the full responsiblity to process a query completely.
    
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