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VoIP For Dummies by Timothy V. Kelly

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Chapter 9

Using VoIP on the Internet

In This Chapter

bullet Understanding how your choice of network affects QoS

bullet Examining protocols

bullet Securing your network with firewalls

bullet Making the Intranet accessible

bullet Connecting with a virtual private network

The Internet is often referred to as a network of networks. The fact of the matter is that the Internet is just another network, albeit with an enormous and global reach. You can access the Internet through the public switched network (PSTN), your wireless personal digital assistant (PDA), or your WiFi notebook at the coffee shop nearest you. You can use your broadband link to access data, voice, and video at home. Your company can access the Internet through any of the dedicated transport lines. (Chapter 4 covers all Internet access network types.) Slow-speed, high-speed, or ultra-high-speed avenues of access can all work simultaneously to support millions of users accessing some portion of the Internet somewhere in the world.

No other network in ...

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