TAILIEUCHUNG - Understanding Voice over Internet Protocol (VoIP)

Voice over Internet Protocol (VoIP) is a form of communication that allows you to make phone calls over a broadband internet connection instead of typical analog telephone lines. Basic VoIP access usually allows you to call others who are also receiving calls over the internet. Interconnected VoIP services also allow you to make and receive calls to and from traditional landline numbers, usually for a service fee. Some VoIP services require a computer or a dedicated VoIP phone, while others allow you to use your landline phone to place VoIP calls through a special adapter. VoIP is becoming an attractive communications. | Understanding Voice over Internet Protocol VoIP Matthew DeSantis US-CERT This paper discusses the advantages and disadvantages of using VoIP services focusing primarily on security issues that may affect those who are new to VoIP. What is VoIP Voice over Internet Protocol VoIP is a form of communication that allows you to make phone calls over a broadband internet connection instead of typical analog telephone lines. Basic VoIP access usually allows you to call others who are also receiving calls over the internet. Interconnected VoIP services also allow you to make and receive calls to and from traditional landline numbers usually for a service fee. Some VoIP services require a computer or a dedicated VoIP phone while others allow you to use your landline phone to place VoIP calls through a special adapter. VoIP is becoming an attractive communications option for consumers. Given the trend towards lower fees for basic broadband service and the brisk adoption of even faster internet offerings VoIP usage should only gain popularity with time. However as VoIP usage increases so will the potential threats to the typical user. While VoIP vulnerabilities are typically similar to the ones users face on the internet new threats scams and attacks unique to IP telephony are now emerging. VoIP configurations Dedicated routers These devices allow you to use your traditional phone to place VoIP calls. They are connected to cable DSL modems or any high-speed internet source and allow you to attach an ordinary telephone. Once configured and with an appropriate VoIP provider and service plan these devices require no special software or interaction with a computer. In fact you only need to pick up your phone and dial a number at the dial tone. You also may bring your adapter with you when you travel and make calls wherever broadband internet access is available. Produced 2006 updated 2008 by US-CERT a government organization. 1 Adapters USB These devices also allow you to use a .

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