DO YOU KNOW ?? "internet" ?? Internet, is actually means INTERconnection of different types of NETworks.
Ok, What's networking ? As I know, it means two or more computer connected and share their resources such as printers, data, Internet connection, application, for example : your mp3s ?? your printer can be used throughout any computer around your home ??
Nowadays, Networks can be conclude to 3 types (I'll say 2 types but that's what I learn from before).
Local Area Network (LAN)
By definition, LAN is Limited to a specific area, usually an office which cannot extend beyond the boundaries of a building, range about 185 meters ,no more than 30 computers.
Metropolitan Area Network (MAN) - Which I consider it has merged into WAN. Since it's hard to define a MAN. I'll say why below.
MAN is rarely used now, MAN & LAN looks identical except it have a widely distance and on each main 'pipeline' they have 1 or more redundant connections
Wide Area Network - (WAN)
WAN, Do I need to explain ?? Yes, I do. Actually, I'll put most explanation in this paragraph. If you can understand this, memorize this type is similar to internet (p.s. Similar NOT the same, the internet is a mixture of LAN and WAN). Since that is the largest WAN on the planet. Most professionals defines that network that use routers and public links. A WAN can be centralized or distributed. A centralized WAN consists of a central computer (at a central site) to which other computers and dumb terminal to connect. In the other hand, The Internet, consists of many interconnected computers in many locations. Thus, it is a distributed WAN.
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