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ADSL is a form of Digital Subscriber Line (DSL) Internet service. ADSL provides greater bandwidth for downloads at the expense of upload speeds. ADSL is the most common form of DSL used in home networking.ADSL is designed to support the typical home user who frequently downloads large amounts of data from Web sites and P2P networks but upload relatively less often. ADSL works by allocating a majority of the available phone line frequencies for communication of downstream traffic
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In other respects, ADSL possesses all of the characteristics one associates with DSL, including "high-speed" service, an "always on" combination of voice and data support, and availability and performance that is limited by physical distance. ADSL is technically capable of up to 6 Mbps (roughly 6000 Kbps), but ADSL customers in practice obtain 2 Mbps or lower for downloads and up to 512 Kbps for uploads.
Wifi means "wireless fidelity". The term "wifi" refers to certain kinds of wireless local area networks, or WLAN (as opposed to LAN, or computers that are networked together with wires).
Travelers with PDA's (like Blackberries) and other handheld devices or laptops with wireless cards can connect to the internet via wifi. A wireless card is like a modem without a phone line (like an airport card in a Mac).
Travelers care what wifi is because with wifi, travelers can log on to the internet anywhere and find a hostel, or a map and directions, check email, download music and everything else you do with a computer connected to the internet at home.
Searching for unintentionally unprotected wifi which travelers can "borrow" is called by many inventive names, including war driving, which means cruising around in a car with a wifi "sniffer" program, like Mac Stumbler, open on a laptop. Seriously.
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In other respects, ADSL possesses all of the characteristics one associates with DSL, including "high-speed" service, an "always on" combination of voice and data support, and availability and performance that is limited by physical distance. ADSL is technically capable of up to 6 Mbps (roughly 6000 Kbps), but ADSL customers in practice obtain 2 Mbps or lower for downloads and up to 512 Kbps for uploads.
Wifi means "wireless fidelity". The term "wifi" refers to certain kinds of wireless local area networks, or WLAN (as opposed to LAN, or computers that are networked together with wires).
Travelers with PDA's (like Blackberries) and other handheld devices or laptops with wireless cards can connect to the internet via wifi. A wireless card is like a modem without a phone line (like an airport card in a Mac).
Travelers care what wifi is because with wifi, travelers can log on to the internet anywhere and find a hostel, or a map and directions, check email, download music and everything else you do with a computer connected to the internet at home.
Wifi Hotspots
Wifi hotspots are places where you can find wifi, free or paid. internet cafes are likely wifi hotspots, and many airports, hotels and bars have wifi hotspots.You can log on to free wifi at hotspots where wifi is intentionally offered to the public without charge; some wifi networks are protected with passwords and you must pay or otherwise be given access to log on. Generally, you can log on to paid wifi with a credit card online; your screen may open with a splash page for the wifi provider, offering you payment choices, if you are trying to log on to the internet in a paid wifi hotspot.
Searching for unintentionally unprotected wifi which travelers can "borrow" is called by many inventive names, including war driving, which means cruising around in a car with a wifi "sniffer" program, like Mac Stumbler, open on a laptop. Seriously.
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