Domain Name System (DNS) Servers
The Domain Name System (DNS) is a distributed database of IP address-to-name translations.
When you type in a web site address or URL such as www.cisco.com, the first thing that happens is that this easy-to-use name gets converted into an IP address. The server is known on the network by its IP address, not by its name. It is easier for users to remember www.cisco.com than 192.168.10.12. This is the main reason that DNS was implemented, but there are other benefits of using a name-resolution service. One of these is round-robin load balancing, where one domain name can be translated to more than one IP address. For example, you could register www.mydomain.com to 192.168.0.1 and 192.168.0.2. Both of these could ...
Get Cisco® Secure Internet Security Solutions now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
