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Let us learn about them in detail.

        Wired

        When the internet connection is provided through wires, it is called wired connectivity. Some the examples are:
        •  Dial up
        •  Digital Subscriber Line (DSL)
        •  Cable Internet Access
        Dial Up

        It is a wired connectivity for Windows 95 and Windows 98 that enables the user’s system to dial up the connection
        using a telephone line to connect to the internet service providers. It was a temporary connection. After the internet
        connection was discontinued the same line worked for connecting the wired telephones. This kind of connection
        required a modem connected to a computer.

        MODEM (Modulator Demodulator) is a device used to convert the digital signals into analog signals and vice versa. It
        is mainly used to connect a telephone to a computer terminal.

        Digital Subscriber Line (DSL)
        It is a technology that is used to transmit digital data using telephone lines. It uses the existing telephone lines to
        transmit high bandwidth data.

        Cable Internet Access
        It is a form of broadband that uses cable television infrastructure to give you high speed internet. It is faster and more
        reliable than DSL.

        Wireless
        When the internet connection is provided in a wireless mode, it is called wireless connectivity. Some of the examples
        are:
        •  Mobile Internet
        •  Wi-Fi (Wireless Fidelity)

        •  Worldwide Interoperability for Microwave Access (WiMAX)
        Mobile Internet

        If there is one technology to name that has revolutionised the way people are contacting or communicating with each
        other in the last 20 years, it must be ‘Mobile Cellular Technology’.

        Portable devices have been in process of huge changes. The data transfer or download speed varies with the congestion
        of the network towers, nature of the data, etc., that have considerably changed and have been upgraded in last 20
        years and thus we can classify the era of mobile technology in different generations as:




















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