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Part: THREE Networking > Domain Name System (DNS)

Chapter SEVENTEEN. Domain Name System (DNS)

Chapter Syllabus

17.1 Configuring a Master Name Server

17.2 Configuring Additional Backup Slave and Caching-Only Name Servers

17.3 Delegating Authority to a Subdomain Including DNS Forwarders

17.4 Configuring DNS to Accept Automatic Updates from a DHCP Server

17.5 Dynamic DNS Server Updates and TSIG Authentication

The DNS is said to be the glue of the Internet. In layman's terms, that normally means converting a hostname into an IP address or an IP address into a hostname. With this IP address, we can then kick the entire IP software into action. Are we talking to a local network and looking up our ARP cache, or do we need to communicate with a remote network and need to know the address of a local router and then consult our routing table? Without DNS, we wouldn't be able to resolve a URL to an IP address. Its primary use is providing resolver capabilities to clients, converting a given name into a different representation of that name. This is the basic functionality that we configure first, although I suspect we know how to set up a rudimentary DNS server. We look at the following tasks:


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