different devices (computers, internet access points, cell phones, PDAs, audio devices, printers, etc..) Near the access point. The scope of a PAN is typically a few meters and is for personal use. PAN networks can be connected with wires to the computer bus (USB and FireWire). WPAN (Wireless Personal Area Network) can also be made possible with network technologies such as IrDA and Bluetooth.
Local area network (LAN) communications network used to interconnect multiple computers and other devices. Its distribution is limited to a building or a range of 200 meters without using a repeater. Are mostly used to connect personal computers and workstations in the home, offices, factories, etc.. This means that users can share resources or devices that are connected to other equipment such as printers, faxes, file sharing, etc...
Campus Area Network (CAN): CAN is a collection of geographically dispersed LANs within a campus (university, government offices, factories, etc..) belonging to the same entity in a limited area in kilometers. CAN A commonly used technologies such as FDDI, wireless, Gigabit Ethernet, and so on. 
Metropolitan Area Network (MAN): A MAN is a collection of LANs or CANs dispersed in a city NACs (tens of kilometers). A MAN used technologies such as ATM, Frame Relay, xDSL (Digital Subscriber Line), WDM (Wavelength Division Modulation), ISDN, E1/T1, PPP, etc. for connectivity through media such as copper, fiber optic, and microwave.
Wide Area Network (WAN): WAN is a collection of geographically dispersed LANs to hundreds of kilometers apart. A network device called a router is able to connect LANs to a WAN. Technologies commonly used ATM (Asynchronous Transfer Mode), Frame Relay, X.25, T1/E1, GSM, TDMA, CDMA, xDSL, PPP, etc. for connectivity through media such as fiber optics, microwave, cellular, satellite, etc..
Storage Area Network (SAN): A network designed to connect servers, arrays (arrays) discs and supporting libraries. It is mainly based on iSCSI or fiber technology. Its function is to connect quickly, securely and reliably various storage elements that comprise it.Referencias:
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