Unit 3.7 The Internet

what is the internet

a global network of interconnected networks.

what is a web browser

A web browser is software that uses the HTTP or HTTPS protocol to access and display web pages.

what does URL stand for and what is it used for

URL stand for uniform resources locator

It is used to access web pages in a web browser

what is dns and what it is used for

dns stand for Domain Name System

it is a server stores a list of domain names and a list of corresponding IP addresses where the website is stored.

state the 5 step to display a webpage

1. A domain name is typed into the address bar of a browser.

2. The browser checks a local (cached) host file to check if it already holds the IP address

3. If it doesnt then A query is sent to the local DNS server for the corresponding IP address of the domain name.#

4. The local DNS server will check if it holds an IP address corresponding to that domain name. If it does it passes the IP address to your browser.

5. The browser then connects to the IP address of the server and accesses the web site.