Like what you see? Get it in one document for easy printing!
Click Here!
Use coupon code "certiguide" to save 20%!
(Expires 2004/12/31)

NEW! Network+ N11-003 2005 Beta Exam Study Guide - Just $9!
Get It Here!

Custom Search







Table Of Contents  CertiGuide to Network+
 9  Chapter 0101:  TCP/IP
      9  V  Name Resolution

Previous Topic/Section
Name Services
Previous Page
Pages in Current Topic/Section
1
Next Page
DNS Configuration
Next Topic/Section

Domain Name System (DNS)

The main name service, DNS (Domain Name Service or Domain Name System) is used throughout the Internet. Unlike HOSTS, it is hierarchical. This means that more than one level of name resolution is involved.

The successive levels denote more and more specific areas of authority, going from most general (and widest authority) in the rightmost component of the name, to most specific in the leftmost component.

Microsoft.com is an example of a 2nd level domain. At the 1st level is the (usually) primary domain suffix, usually three letters after the dot (.).

1st level domain names

Know the popular 1st level domain names. They are:

. Com - commercial

. Edu - education

. Gov - government

. Org - organizational

. Mil - US military

. Net - Networks


A registration for having a 2nd level domain is done through InterNIC (Internet Network Information Center). While domains are registered on a first come, first served basis, the authority reserves the right to revoke ownership if is a violation of another firms trademark. Most recently, InterNIC revoked a number of registrations based on the fact that ‘squatters’ registered many thousands of names from one person. This speculation is forbidden.

DNS lookup

DNS lookup needs;

Host name

Domain name

DNS server IP address



Previous Topic/Section
Name Services
Previous Page
Pages in Current Topic/Section
1
Next Page
DNS Configuration
Next Topic/Section

If you find CertiGuide.com useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider buying an inexpensive PDF equivalent of the CertiGuide to Network+ from StudyExam4Less.com. (Use coupon code "certiguide" by December 31, 2004 to save 20%!) Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

CertiGuide for Network+ (http://www.CertiGuide.com/netplus/) on CertiGuide.com
Version 1.0 - Version Date: November 7, 2004

Adapted with permission from a work created by Tcat Houser and Helen O’Boyle.
CertiGuide.com Version © Copyright 2004 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.