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The Internet (or internet) [a] is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) [b] to communicate between networks and devices. It is a network of networks that consists of private , public, academic, business, and government networks of local to global scope, linked by a broad array of ...
A range of more precise definitions of speed have been prescribed at times, including: "Greater than the primary rate" (which ranged from about 1.5 to 2 Mbit/s) —CCITT in "broadband service" in 1988. [26] "Internet access that is always on and faster than the traditional dial-up access" [24] —US National Broadband Plan of 2009 [27]
List of countries by Internet connection speeds; List of countries by IPv4 address allocation; List of sovereign states by number of broadband Internet subscriptions; List of sovereign states by number of Internet hosts; List of countries by number of Internet users; List of Crackle original programming
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
In frequency (and thus energy), UV rays sit between the violet end of the visible spectrum and the X-ray range. The UV wavelength spectrum ranges from 399 nm to 10 nm and is divided into 3 sections: UVA, UVB, and UVC. UV is the lowest energy range energetic enough to ionize atoms, separating electrons from them, and thus causing chemical reactions.
This is a sortable list of broadband internet connection speed by country, ranked by Speedtest.net data for March 2024, [1] and with M-Lab data for June 2023 [2] Country/Territory Median
Satellite Internet access provides fixed, portable, and mobile Internet access. [82] Data rates range from 2 kbit/s to 1 Gbit/s downstream and from 2 kbit/s to 10 Mbit/s upstream. In the northern hemisphere, satellite antenna dishes require a clear line of sight to the southern sky, due to the equatorial position of all geostationary satellites.
Mobile-cellular access refers to high-speed mobile access to the public Internet at advertised data speeds equal to, or greater than, 256 kbit/s. To be counted, a mobile subscription must allow access to the greater Internet via HTTP and must have been used to make a data connection using the Internet Protocol in the previous three months.