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  2. DisplayPort - Wikipedia

    en.wikipedia.org/wiki/DisplayPort

    DisplayPort cables up to 2 meters in length are required to support the full 10.8 Gbit/s bandwidth. DisplayPort 1.1 allows devices to implement alternative link layers such as fiber optic , allowing a much longer reach between source and display without signal degradation, [9] although alternative implementations are not standardized.

  3. Contention ratio - Wikipedia

    en.wikipedia.org/wiki/Contention_ratio

    Contention ratio. In computer networking, the contention ratio is the ratio of the potential maximum demand to the actual bandwidth. The higher the contention ratio, the greater the number of users that may be trying to use the actual bandwidth at any one time and, therefore, the lower the effective bandwidth offered, especially at peak times. [1]

  4. PSK31 - Wikipedia

    en.wikipedia.org/wiki/PSK31

    A waterfall display depicting several PSK31 transmissions at around 14,070 kHz. The green lines indicate a station that is transmitting. PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high ...

  5. Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Wi-Fi

    v. t. e. Wi-Fi ( / ˈwaɪfaɪ /) [1] [a] is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves. These are the most widely used computer networks, used globally in ...

  6. WiMAX - Wikipedia

    en.wikipedia.org/wiki/WiMAX

    WiMAX base station equipment with a sector antenna and wireless modem on top. Worldwide Interoperability for Microwave Access (WiMAX) is a family of wireless broadband communication standards based on the IEEE 802.16 set of standards, which provide physical layer (PHY) and media access control (MAC) options.

  7. Bandwidth allocation - Wikipedia

    en.wikipedia.org/wiki/Bandwidth_allocation

    Bandwidth allocation is the process of assigning radio frequencies to different applications. The radio spectrum is a finite resource, which means there is great need for an effective allocation process. In the United States, the Federal Communications Commission or FCC has the responsibility of allocating discrete portions of the spectrum, or ...

  8. GSM - Wikipedia

    en.wikipedia.org/wiki/GSM

    Website. www .gsma .com. The Global System for Mobile Communications ( GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such as mobile phones and tablets. GSM is also a trade mark owned by the GSM ...

  9. History of the metre - Wikipedia

    en.wikipedia.org/wiki/History_of_the_metre

    The definition in terms of the speed of light also means that the metre can be realised using any light source of known frequency, rather than defining a "preferred" source in advance. Given that there are more than 22,000 lines in the visible spectrum of iodine, any of which could be potentially used to stabilise a laser source, the advantages ...

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