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Linux Unix Network Administration  «Prev  Next»
Lesson 1

Introduction to DNS Lookup

This module will explore DNS and use the program nslookup to probe the DNS database. The nslookup program is free software, available under all UNIX versions as well as Windows. It generates name server queries on command, and is useful for debugging DNS.
  1. DNS: Domain Name Service (DNS) is an Internet-wide service for converting numeric IP addresses to host names and back.
  2. name server: A name server is a process that accepts queries into the DNS database. It is also fairly common usage to refer to the computer on which this process is running as a name server.
By the end of this module, you will be able to:
  1. Explain the basic use of the nslookup program
  2. Use nslookup to read other types of Resource Records
  3. Use nslookup to use a different name server and to list an entire zone
  4. Describe the components of the BIND package
  5. Define the elements of the name server configuration file