Page 13 - DCAP202_Fundamentals of Web Programming

Fundamentals of Web Programming
Notes
6 LOVELY PROFESSIONAL UNIVERSITY
6. The ISP's DNS Server tells the User's operating system the IP Address for google.com.
7. The operating system tells the Web Browser the IP Address for www.google.com.
8. The web browser connects and starts communication with www.google.com.
Self Assessment
Fill in the blanks:
6. A ........................... is an identification string that defines a realm of administrative autonomy,
authority, or control on the Internet.
7. A ........................... is a label that is assigned to a device connected to a computer network
and that is used to identify the device in various forms of electronic communication.
1.4 Establishing Connectivity to the Internet
All modern computers and laptops are capable of connecting to the internet, as are many other
devices, including mobiles, tablets, e-readers, televisions, video games consoles.
There are two ways of getting the internet at home. The most popular way is to have your
telephone line (also known as a 'landline') converted to broadband so that it can carry normal
phone calls and internet data at the same time.
However, if you don't have a landline or if you want to be able to use the internet when you're
out and about, you might prefer mobile internet from one of the mobile network providers.
This can be used anywhere there's a mobile signal but does tend to be slower and more expensive
than broadband through a landline.
Follow these step-by-step instructions to connect to the internet
Step 1: Choose an Internet Service Provider (ISP). This could be the company that provides your
telephone line or it could be one of the many independent providers. To help you choose, have
a look at one of the many comparison websites and ask people you know for their opinion.
Some ISPs, particularly the mobile suppliers, impose a monthly download limit or usage
allowance. This is measured in gigabytes (Gb). To put this in context, 1Gb will allow you to visit
approximately 10,500 webpages or download around 205 songs.
Step 2: Having chosen an ISP and signed the contract, you'll have to wait a few days while your
line is converted to broadband. During this time, you should receive a letter with your username
and password and the hardware you'll need: a small box called a 'router' and its attachments.
Step 3: Once you're told that your broadband is active, you can set up your router. It should have
come with three cables:
 a network cable to connect the router to your computer
 a power cable
 a cable that will go between your router and a microfilter (see below).
 Plug one end of the network cable into the appropriately shaped socket in the router, and
the other end in a similarly appropriately shaped socket in your computer.
Take the power cable and plug one end in the router and the other in a nearby power point.