________ is a VoIP service that currently offers free calling among its customers over the Internet and reduced-cost calling to and from Public Switched Telephone Network customers.
A) Skype
B) SIP
C) SPIT
D) IM

Question

Quizplus · Accepted Answer

Skype is a popular VoIP service that allows users to make free calls to other Skype users over the internet, as well as to make low-cost calls to landlines and mobile phones. SIP is a protocol used in VoIP communication, and not a specific VoIP service. SPIT is unwanted or unsolicited voice communication, while IM refers to instant messaging and not specifically to VoIP services.

________ Is a VoIP Service That Currently Offers Free Calling