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 ...