SSC General Science & Technology Sample Paper NCERT Sample Paper-4

  • question_answer
    Which one of the following statements is correct?

    A)  Wi-Fi technology creates Metropolitan Area Network while Bluetooth creates Wireless Local Area Network

    B)  Both Wi-Fi and Bluetooth uses microwave signals to transmit information between two terminal devices

    C)  Wi-Fi can be' used in the transmission of information more than 100 metres while Bluetooth in 100 or less than 100 metres distance

    D)  Both the statements 'a' and 'b' about the Wi-Fi and Bluetooth are correct

    Correct Answer: C

    Solution :

    [c] Wi-Fi or WiFi is a local area wireless computer Networking technology that allows electronic devices to connect to the network, mainly using the 2.4 gigahertz (12 cm) UHF and 5 gigahertz (6 cm) SHF ISM radio bands. Many devices can use Wi-Fi, e.g. personal computers, video-game consoles, smart phones, digital cameras, tablet computers and digital audio players. These can connect to a network resource such as the Internet via a wireless network access point. Such an access point (or hotspot) has a range of about 20 meters (66 feet) indoors and a greater range outdoors. Hotspot coverage can be as small as a single room with walls that block radio waves, or as large as many square kilometres achieved by using multiple overlapping access points.

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