Chapter 3. DNS Operations

This chapter describes the operation of a DNS system. Namely, you'll learn about the following topics:

  • DNS queries: How does your browser find www.example.com? How does your mail software know where to send your outgoing e-mail? Such operations use DNS queries.

  • Reverse mapping: How does your mail software determine your identity? How do you find out who is hacking your system? These types of operations use a technique known as reverse mapping.

  • Zone maintenance: How does the address of your new FTP service get propagated across the Internet? How are your customers notified of any change to your e-mail provider? These operations use zone maintenance.

  • DNS security: How do you prevent your web site being hijacked? How do you ...

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