Wi-Fi

Wi-Fi (pronounced /ˈwaɪfaɪ/) is a trademark of the Wi-Fi Alliance that may be used with certified products that belong to a class of wireless local area network (WLAN) devices based on the IEEE 802.11 standards. Because of the close relationship with its underlying standard, the term Wi-Fi is often used as a synonym for IEEE 802.11 technology.[1][2]
The Wi-Fi Alliance is a global, non-profit association of companies that promotes WLAN technology and certifies products if they conform to certain standards of interoperability. Not every IEEE 802.11-compliant device is submitted for certification to the Wi-Fi Alliance, sometimes because of costs associated with the certification process and the lack of the Wi-Fi logo does not imply a device is incompatible with Wi-Fi devices.
Today, an IEEE 802.11 device is installed in many personal computers, video game consoles, smartphones, printers, and other peripherals, and virtually all laptop or palm-sized computers.

Wi-Fi merupakan kependekan dari Wireless Fidelity, yang memiliki pengertian yaitu sekumpulan standar yang digunakan untuk Jaringan Lokal Nirkabel (Wireless Local Area Networks - WLAN) yang didasari pada spesifikasi IEEE 802.11. Standar terbaru dari spesifikasi 802.11a atau b, seperti 802.16 g, saat ini sedang dalam penyusunan, spesifikasi terbaru tersebut menawarkan banyak peningkatan mulai dari luas cakupan yang lebih jauh hingga kecepatan transfernya.
Awalnya Wi-Fi ditujukan untuk penggunaan perangkat nirkabel dan Jaringan Area Lokal (LAN), namun saat ini lebih banyak digunakan untuk mengakses internet. Hal ini memungkinan seseorang dengan komputer dengan kartu nirkabel (wireless card) atau personal digital assistant (PDA) untuk terhubung dengan internet dengan menggunakan titik akses (atau dikenal dengan hotspot) terdekat.

dikutip dari
http://id.wikipedia.org/wiki/Wi-Fi
http://en.wikipedia.org/wiki/Wi-Fi
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Backbone

The Internet backbone refers to the main "trunk" connections of the Internet. It is made up of a large collection of interconnected commercial, government, academic and other high-capacity data routes and core routers that carry data across the countries, continents and oceans of the world.

The resilience of the Internet is due to its core architectural feature of storing as little as possible network state in the network elements and rather relying on the endpoints of communication to handle most of the processing to ensure data integrity, reliability, and authentication. In addition, the great degree of redundancy of today's network links and sophisticated real-time routing protocols provide alternate paths of communications for load balancing and congestion avoidance.

Backbone
Saluran utama (tulang punggung) penghubung antar network pada suatu daerah/area yang jaraknya saling berjauhan

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CCITT

Singkatan dari Comité Consultatif International Téléphonique et Télégraphique,sebuah organisasi dunia dibawah organisasi induk ITU (International Telecommunication Union)yang mengatur standarisasi dalam dunia pertelekomunikasian data.Seperti V.22 (komunikasi data half-duplex dgn speed rate 1.200 bps), V.32 (standard untuk modem full-duplex dgn saluran telepon dgn speed rate 4.800 bps dan 9.600 bps),dsb.