1 / 7

Domain Name & Domain Name Server (DNS)

Domain Name & Domain Name Server (DNS). IP = a string of numbers Computers can work on them efficiently But meaningless and difficult to remember for human  Domain Name Give to each host (with IP) for easy identification (by human) Easier to remember. www.yahoo.com Better than

vida
Download Presentation

Domain Name & Domain Name Server (DNS)

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. Domain Name & Domain Name Server (DNS) • IP = a string of numbers • Computers can work on them efficiently • But meaningless and difficult to remember for human •  Domain Name • Give to each host (with IP) for easy identification (by human) • Easier to remember

  2. www.yahoo.com Better than 66.218.71.112

  3. Domain Name www.yahoo.com.hk www.info.gov.hk intranet.kcc.edu.hk pta.mst.edu.hk • intranet.kcc.edu.hk

  4. Host Name Sub-domain (Name of server) Generic Code (top-level domain) 2nd level domain (Name of org) Country code (top-level domain) • intranet.kcc.edu.hk

  5. Top-level Domain • Country Code • Indicate the geographical location of the host computer (server) • .ca / .cn / .hk / .jp / .uk / .us • Generic Code • Indicate the type of organization • .com / .edu / .net / .org / .idv / .mil

  6. 2nd -level Domain • Represent the name of the organization • Sub-Domain • Represent the host (server) of the domain • One domain can has many sub-domain • Most common : www • Map to its IP • E.g. 218.188.3.5 = aero.kcc.edu.hk

  7. Domain Name Server • Since • IP is used by computer • Domain Name is more convenient to human • A specialized host • Domain Name Server • Used to translate the domain names into the corresponding IP address • Or vice versa

More Related