O'Reilly logo

31 Days Before Your CCENT Certification by Scott Bennett

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

CCNA Discovery 2, Chapter 7

7.3.1: As mentioned, a domain name such as cisco.com is easier to remember than an IP address. Each network host contains a HOSTS file that matches names to IP addresses. This HOSTS file is scanned first by the host to resolve a request for a domain. However, this HOSTS file contains a very limited list of names and IP addresses, so a DNS server performs the bulk of domain resolution on a network.

7.3.2: DNS operates using a hierarchical structure in which many servers across the Internet maintain a distributed database of hostname-to-IP mappings. DNS servers maintain hostname-to-IP mappings for their zone. If a DNS server receives a request for DNS resolution of a domain outside its zone, the DNS server forwards the ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required