DNS resolution is the process of converting a domain name to an IP address. It works similarly to looking up a phone number in a phone book by hierarchy. All devices on the internet communicate through IP addresses, so DNS resolution occurs any time a website or email is accessed to translate the domain name into the IP address needed to connect. Reverse DNS resolution works in the opposite direction to convert an IP address into its associated domain name.
A complete Coverage of DNS and its features. This ppt deals with well balanced practical and theoretical aspects of DNS. The best ppt for a novice learner.
A complete Coverage of DNS and its features. This ppt deals with well balanced practical and theoretical aspects of DNS. The best ppt for a novice learner.
Learn about the essentials of the Domain Name System (DNS), including name resolution, different record types, roots, zones, authority and recursion.
See the full webinar and the rest of the series at https://www.thousandeyes.com/resources/intro-to-dns-webinar
This is Powerpoint Presentation on IP addressing & Subnet masking. This presentation describes how IP address works, what its classes and how the subnet masking works and more.
Overview of the Domain Name System (DNS).
In the early days of the Internet, hosts had a fixed IP address.
Reaching a host required to know its numeric IP address.
With the growing number of hosts this scheme became quickly awkward and difficult to use.
DNS was introduced to give hosts human readable names that would be translated into a numeric IP addresses on the fly when a requesting host tried to reach another host.
To facilitate a distributed administration of the domain names, a hierarchic scheme was introduced where responsibility to manage domain names is delegated to organizations which can further delegate management of sub-domains.
Due to its importance in the operation of the Internet, domain name servers are usually operated redundantly. The databases of both servers are periodically synchronized.
Learn about the essentials of the Domain Name System (DNS), including name resolution, different record types, roots, zones, authority and recursion.
See the full webinar and the rest of the series at https://www.thousandeyes.com/resources/intro-to-dns-webinar
This is Powerpoint Presentation on IP addressing & Subnet masking. This presentation describes how IP address works, what its classes and how the subnet masking works and more.
Overview of the Domain Name System (DNS).
In the early days of the Internet, hosts had a fixed IP address.
Reaching a host required to know its numeric IP address.
With the growing number of hosts this scheme became quickly awkward and difficult to use.
DNS was introduced to give hosts human readable names that would be translated into a numeric IP addresses on the fly when a requesting host tried to reach another host.
To facilitate a distributed administration of the domain names, a hierarchic scheme was introduced where responsibility to manage domain names is delegated to organizations which can further delegate management of sub-domains.
Due to its importance in the operation of the Internet, domain name servers are usually operated redundantly. The databases of both servers are periodically synchronized.
How small organizations such as startups, non-profits and clubs can get a complete online presence without developers, an IT department or a budget. Covers domain names, registrars, DNS, web hosting, email and groupware hosting, CRM, content management systems to build web sites, e-commerce, SEO and online advertising.
Presented to the UCLA Anderson School of Management's Entrepreneur Association.
3. DNS Background What does it mean to "register" a domain name? The Internet domain name system (DNS) consists of a directory, organized hierarchically, of all the domain names and their corresponding computers registered to particular companies and persons using the Internet. When you register a domain name, it will be associated with the computer on the Internet you designate during the period the registration is in effect. – Taken from ICANN.com
4. So what is DNS Resolution? DNS Resolution is the procedure used to resolve a IP address from a domain name. This is very similar to how we get the phone number of a person we want to contact. It is all based on hierarchy.
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6. DNS Foundation All computers communicate by addressing each other using IP addresses. So every time you try to connect to a website, or send an e-mail, DNS resolution is occurring. Just like phone numbers, multiple domain names can resolve to the same IP address.
7. Domain Names vs. URLs A domain name is contained in a URL. See the examples below. ftp://ftp.company.com/downloads.report.doc http://www.networkclue.com/index. php Protocol Resource or File Hostname Domain Name Fully Qualified Domain Name (FQDN)
8. DNS Resolution Scenario 5 components http://www.google.com Business DNS 1.2.3.1 Web Server 1.2.3.4 Internet ISP DNS 3.3.3.1 End User PC GTLD Servers
11. GTLD History Internic ICANN Internet Consortium for Assigned Names and Numbers Domain Registrars Godaddy.com Register.com Net Sol
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13. IP Address Registration ICANN Internet Consortium for Assigned Names and Numbers IP Registrars ARPNIC Asia Pacific Registry RIPE European Registry ARIN American Registry for Internet Numbers
14. Reverse DNS Resolution Reverse DNS Resolution is the procedure used to resolve a domain name from an IP address. Recall: Multiple domain names can resolve to an IP address (just like multiple people can have the same phone number). It is the ISP’s responsibility to maintain reverse DNS tables.
15. Reverse DNS Resolution 4 components Internet 4.3.2.1.in-addr.arpa Business DNS 1.2.3.1 Web Server 1.2.3.4 ISP DNS 3.3.3.1 GTLD Servers
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