Chapter 6

DNS

IN THIS CHAPTER

Bullet Discovering the basics of DNS

Bullet Exploring zones

Bullet Examining resource records

Bullet Configuring a DNS server

Bullet Setting up a DNS client

Domain Name System (DNS) is the Transmission Control Protocol/Internet Protocol (TCP/IP) facility that lets you use names rather than numbers to refer to host computers. Without DNS, you’d buy books from 13.255.148.15 instead of from www.amazon.com and you’d sell your used furniture at 23.208.65.111 instead of on www.ebay.com.

Understanding how DNS works and how to set up a DNS server is crucial to setting up and administering a TCP/IP network. (For more on TCP/IP, see Chapter 2 of this minibook.) This chapter introduces you to the basics of DNS, including how the DNS naming system works and how to set up a DNS server.

Technical Stuff If you want to review the complete official specifications for DNS, look up RFC 1034 and 1035 at www.ietf.org/rfc/rfc1034.txt ...

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