ST05-018: Understanding Voice over Internet Protocol (VoIP)

With the introduction of VoIP, you can use the internet to make telephone calls instead of relying on a separate telephone  line. However, the technology does present security risks.

What is voice over internet protocol (VoIP)?  Voice over internet protocol (VoIP), also known as IP telephony, allows you to use your internet connection to make telephone calls. Instead of relying on an analog line like traditional telephones, VoIP uses digital technology and requires a high-speed broadband connection such as DSL or cable. There are a variety of providers who offer VoIP, and they offer different services. The most common application of VoIP for personal or home use is internet-based phone services that rely on a telephone switch. With this application, you will still have a phone number, will still dial phone numbers, and will usually have an adapter that allows you to use a regular telephone. The person you are calling will not likely notice a  difference from a traditional phone call. Some service providers also offer the ability to use your VoIP adapter any place you have a high-speed internet connection, allowing you to take it with you when you travel.

What are the security implications of VoIP?

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