DNS zone transfers

Im researching blocking zone transfers.  I havent any real experience with DNS.  I know how to block zone transfers, but I am concerened about the effects.  Zone transfers are used to transfer zone information in total right.  Does blocking them impede the transfer of information entirely?  Why?

Thanks for the help.
Ian
:)
RebelnorthAsked:
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Chris DentConnect With a Mentor PowerShell DeveloperCommented:
Hi Ian,

Blocking zone transfers does not block specific DNS queries. A client can ask if www, MX, NS, SOA etc records exist - each is a specific query type and not a request for data for the entire domain.

What it will do is prevent someone using the list command under nslookup to obtain information about your domain. It will also stop other name servers taking a copy of the entire domain without your explicit permission.

HTH

Chris
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