VoIP (voice over IP) is an IP telephony term for a set of facilities used to manage the delivery of voice information over the Internet.VoIP involves sending voice information in digital form in discrete packets rather than by using the traditional circuit-committed protocols of the public switched telephone network (PSTN). A major advantage of VoIP and Internet telephony is that it avoids the tolls charged by ordinary telephone service.
IP stands for Internet Protocol. An IP address is a long and unique number that devices use to identify and communicate with each other. When you log into the internet your computer equipment is essentially given a unique (to keep the explanation simple) number.
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