In this example, your hostname is the website www.novell.com. Suppose that you would
like to visit the Linux section of the website to find out more about openSUSE. The
website??™s IP address is 130.57.5.25. You are currently on a home laptop running
openSUSE. You open a web browser and attempt to visit the www.novell.com site by
entering the easy-to-remember Uniform Resource Locator (URL) of www.novell.com.
Consider the following steps, shown in Figure 27.1, that are taken when you enter a
domain name into your web browser:
CHAPTER 27 Managing Domain Names 550
Computer
ISP DNS
server
Local DNS
server
www.novell.com
5.
1.
4
3
2.
FIGURE 27.1 Viewing a simple DNS design.
1. Your local system (with help from you, of course) wants to get to www.novell.com.
To do this, it needs to know what Novell??™s website IP address is and because it does
not, it asks its locally configured hosts file to resolve the DNS name: novell.com.
This local system currently does not have any entries in the hosts file; therefore, the
manually configured DNS server (the local DNS server) will attempt to resolve it.
Pages:
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064