We will learn on how to connect to internet i.e. internet service providers, software and hardware requirements, configuring internet connection etc.
ISP is a company providing internet access. Below are the services they offer.
Below is the diagram where the ISPs are classified into six categories.
Using telephone lines, cable wi-fi or fiber optics, the internet access is provided.
These providers provide mailbox hosting services.
They provide e-mail and other web hosting services such as clouds, virtual machines etc.
These ISPs provide internet access using other ISP services.
These ISPs don’t charge for providing internet services.
One can connect to the internet using the below connection types.
Telephone line is used to connect the computer to the internet. It needs only a modem which works as an interface between computer and the telephone line to the setup.
Modem can be instructed to make a call to a particular number provided by an ISP.
Below protocols are used by Dial-up connection.
Below diagram depicts the modem accessing internet.
ISDN creates the connection using the phone lines that carry digital signals and not the analog signals.
There are two techniques to deliver ISDN services:
The BRI ISDN consists of three distinct channels on a single ISDN line: t1o 64kbps B (Bearer) channel and one 16kbps D (Delta or Data) channels.
The PRI ISDN has 23 B channels and one D channels with both having operating capacity of 64kbps individually making a total transmission rate of about 1.54Mbps.
Below diagram depicts the internet access using ISDN connection.
It stands for Digital Subscriber Line. It provides connection over ordinary telephone lines.
Below are the various versions of DSL techniques.
Above mentioned technologies varies in their upload and download speed, bit transfer rate and level of service.
Below diagram depicts the way we connect to internet with DSL technology.
Using Cable TV Lines, the internet connection is provided. Data is transferred at high speeds than common telephone line using coaxial line.
Below diagram depicts how cable TV connection accesses the internet.
Below diagram depicts how the internet is accessing via satellite internet connection.
Radio frequency bands are used to connect to internet and high speeds are achieved using Wireless Internet Connection. It is created by either Bluetooth or WiFi.
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