Which statement is true of Voice over Internet Protocol (VoIP)? a. Callers can be screened even with blocked caller IDs. b. Calls cannot be forwarded by users. c. Voicemails are not received on the computer. d. Users often experience busy lines.

Communication can be defined as a process which typically involves the transfer of information from one person (sender) to another (recipient), through the use of semiotics, symbols and signs that are mutually understood by both parties. Some of the most widely used communication channel or medium over the internet are an e-mail (electronic mail) and Voice over Internet Protocol (VoIP).

Voice over Internet Protocol (VoIP) is also known as IP Telephony and it's a type of communication technology which typically involves the use of broadband connection for the transmission of voice data between two or more people. Thus, it requires the use of internet enabled devices such as smartphones, computers, IP phones, etc.

Blocking a number with the VoIP technology prevents the blocked user from calling or contacting your line. However, you can still screen or carry out some investigations with respect to the blocked number through Voice over Internet Protocol (VoIP).

Hence, the statement which is true of Voice over Internet Protocol (VoIP) is that, callers can be screened even with blocked caller IDs.