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A DSL receiver
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configures the TCP/IP options for the NIC to match the settings demanded by the DSL provider, and that s about it Within moments, you re surfing at blazing speeds You don t need a second telephone line You don t need to wear a special propeller hat or anything The only kicker is that your house has to be within a fairly short distance from a main phone service switching center, something like 18,000 feet This pretty much stops everybody but inner-city dwellers from having access to DSL service
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Cable
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Cable offers a different approach to high-speed Internet access, using regular cable TV cables to serve up lightning-fast speeds It offers comparable service to DSL with a 384 Kbps upload and 2+ Mbps download Cable Internet connections are theoretically available anywhere you can get cable TV Cable Internet connections start with an RG-6 or RG-59 cable coming into your house The cable connects to a cable modem that then connects to a NIC in your PC via UTP Ethernet cable Figure 1834 shows a typical cable setup One nice advantage of cable over DSL is that if you have a TV tuner card in your PC,
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CHAPTER 18 Networking in Windows
you can use the same cable connection (with a splitter) to watch TV on your PC Both DSL and cable modem Internet connections can be used by two or more computers if they are part of a LAN, including those in a home
Most businesses connect their internal LAN to an ISP via some hardware solution that Network+ techs deal with Figure 1835 shows a typical small-business wiring closet with routers that connect the LAN to the ISP You learned all about wiring up a LAN in 13, so there s no need to go through any basics here To complete a LAN connection to the Internet, you need to add a second NIC or a modem to one of the PCs and then configure that PC as the default connection We ll revisit this idea in a moment with Internet Connection Sharing
Wireless
Every once in a while a technology comes along that, once the kinks are smoothed out, works flawlessly, creating a magical computing experience Unfortunately, the various wireless networking technologies out there today don t fulfill that dream yet When they work, it s like magic You walk into a coffee shop, sit down, and flip open your laptop computer After firing up your Internet browser, suddenly you re quaffing lattes and surfing Web sites with no wires or setup at all
FIGURE 1835
A wiring closet
MIKE MEYERS A+ CERTIFICATION PASSPORT
You spent a good deal of 14 working thorough wireless connectivity to a LAN, so none of that is rehashed here Suffice it to say that connecting to the Internet via wireless means that you must connect to a LAN that s wired to an ISP or connect to a cellular network The local Internet caf purchases highspeed Internet service from the cable or telecom company, for example, and then connects a wireless access point (WAP) to its network When you walk in with your portable PC with wireless NIC and open a Web browser, the wireless NIC communicates with the fully wired DHCP server via the WAP and you re surfing on the Internet It appears magically wireless, but the LAN to ISP connection still uses wires Cellular networking is even more seamless Anywhere you can connect with your cell phone, you can connect with your cellular network aware portable or laptop computer
Travel Advisory
One form of wireless communication does not require local wires Wireless Broadband relies on the ISP putting up a tower, and then any building within the line of sight (perhaps up to 10 miles) can get a high-speed connection
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