Section 2 - Domain Naming

At the end of Section 1, we examined a simple Internet operation - a hypertext page transfer. Remember these key points?

• A Web browser requested this URL: http://www.FreeSoft.org/Connected/index.html

• The DNS protocol was used to convert www.FreeSoft.org into the 32-bit IP address 205.177.42.129

• The HTTP protocol was used to construct a GET /Connected/index.html message

• A table lookup in /etc/services revealed that HTTP uses TCP port 80

• The TCP protocol was used to open a connection to 205.177.42.129, port 80, and transmit the GET /Connected/index.html message

• The IP protocol was used to transmit the TCP packets to 205.177.42.129

• Some media-dependent protocols were used to actually transmit the IP packets across the physical network

Over the next few sections in this course, we'll be looking at each step of this procedure at a high level of detail.

In this section, we'll examine the DNS protocol, used in the second step to convert the hostname www.FreeSoft.org into 205.177.42.129, the 32-bit numeric address used by the TCP and IP protocols.

• Naming
• DNS Theory
• RFC 1034
• DNS Design Goals
• Elements of DNS
• Domain Names
• Resource Records
• Introduction to DNS
• Name Servers
• The DNS Protocol
• Dig I
• Dig II
• Zones
• The in-addr.arpa Domain
• Section 2 Conclusion

Dies ist ein Mirror von Connected: An Internet Encyclopedia von Brent Baccala. Die offizielle Projekt-Homepage findet sich im Web unter www.freesoft.org/CIE. Dieser Mirror wurde zuletzt aktualisiert am Samstag, 28 Januar 2006 18:17 +0100.