Internet Domain Names
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Transcript of Internet Domain Names
Part 3: Domain Name
Reem AbuZayedh
CIS 1203 Web Technologies
Keywords1. URL2. Domain Name3. IP address4. Domain Name System5. Organization code6. Country code
Objectives
1. What is URL
2. Domain Name and IP Address
3. What is Domain Name System DNS?
4. Browser and DNS
5. Parts of Domain Name
6. Organization code
7. Country code
1- URL URL: Uniform Resource Locator
URL: stands for the address of a website.
Example:
The URL of Albayan newspaper is:
http://www.albayan.ae/
alainfootball.pdf
2- Domain Name and IP Address
Each Web server has a unique IP
address and a domain name.
URL: http://www.google.com
Domain Name of the web server:
google.com
IP Address of the web server:
209.85.148.104
3- Domain Name System DNS (1/2)
It is hard for us to remember numbers (IP
Address 209.85.148.104) but it is easier
for us to remember names (Domain name
google.com)!
DNS helps in this! You don’t have to
memorize all IP Addresses of your favorite
websites!
3- Domain Name System DNS (2/2)
Domain Name System DNS:
DNS Server links google.com to the IP
Address 209.85.148.104
4 -Browser and DNS (1/2)
1. When you type a URL, on the browser, for example:
http://www.emaratalyoum.com/sports
2. The browser breaks the URL (address) into 3 parts:
1. Protocol: http
2. Domain name: emaratalyoum.com
3. The resource/webpage name (optional) : sports
3. See the next slide to know how the browser uses the
domain name emaratalyoum.com
4 -Browser and DNS (2/2)
208.43.117.197Emaratalyoum Server
You
DNS Server
1
2
3
4
1- The browser asks
DNS server about IP
address of
emaratalyoum.com
2- DNS server returns the IP address 208.43.117.197
3- The browser requests to view the content of 208.43.117.197
4- Server accepts and browser views the website.
Copy of Sports
webpage
5 -Parts of Domain Name As you know form slide 7, the below URL contains
3 parts: https://www.hct.ac.ae/students
3 parts of the Domain name :
1. Organization name: hct
2. Organization code: ac (academic)
3. Country code: ae (Arab Emirates)
Some domain names contain only organization
code, for example: microsft.com why?
Protocol
Domain Name
Resource
6 -Organization codeOrganization Name
Academic .aceducational .educompany .cocommercial .comgovernmental .govinformation .infoUS military .milbusiness .biz
7- Country CodeCountry Name
United Arab Emirates .ae
Australia .au
South Africa ????????
Canada .ca
Germany .de
Spain .es
Ireland .ie
Italy .it
Kuwait .kw
Oman .om
Qatar .qa
Saudi Arabia .sa
United Kingdom .uk
United States of America .us
Additional
The subnet mask signifies which part of the IP address is network and which part is host.
Subnet Mask
Default Gateway:
The default gateway address is the address of the router interface connected to the same local network as the source host
The IP address is a logical network address that identifies a particular Computer
IP Address