1 / 13

CPSC441

Introduction. Instead of using the numeric IP Address of the host it is possible to use the host name. Example:www.google.caacs3.acs.ucalgary.caTranslation of names to IP Addresses is done by nodes called Name Servers. DNS Name Space. Hierarchy Structure ROOT. . . CA Country leve

abram
Download Presentation

CPSC441

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Jan 5, 1998 CMPN 369 CPSC441 DNS Module Domain Name Service

    2. Introduction Instead of using the numeric IP Address of the host it is possible to use the host name. Example: www.google.ca acs3.acs.ucalgary.ca Translation of names to IP Addresses is done by nodes called Name Servers

    3. DNS Name Space Hierarchy Structure ROOT

    4. Domain Name Resolution User program issues the request Query to Name Server is formulated The name server checks if name in database. If not, ask the higher level Name Server Finally the user program gets IP Address or error

    5. Subdomain versus Subnet Fully Qualified Domain Name. Example: thunder.it.sait.ab.ca thunder - Actual host name it.sait.ab.ca - Part of the domain (subdomain) IP Address: 142.110.16.7 142.110 - sait.ab.ca 16 - Subnet Number 7 - Host Number

    6. Subdomain versus Subnet Subdomain can have many subnets Subnet can have many subdomains Command nslookup provides the conversion between Domain Names and IP Addresses

    7. Generic Domains

    8. The DNS Name Space A portion of the Internet domain name space.

    9. Resource Records The principal DNS resource records types.

    10. Resource Records

    11. Name Servers Part of the DNS name space showing the division into zones.

    12. Name Servers ( flits.cs.vu.nl ->linda.cs.yale.edu ) How a resolver looks up a remote name in eight steps.

More Related