Which of the following technologies allows people to communicate all over the world inexpensively?

Virtualization creates virtual versions of hardware or resources but is not directly a communication technology for people.

SSID (Service Set Identifier) is the name of a Wi-Fi network and is part of network identification, not a global communication technology itself.

Kinetics generally refers to the study of motion and forces, or in some contexts, a brand name; it is not a communication technology.

VoIP (Voice over Internet Protocol) is a technology that allows voice communications to be made over an IP network, such as the internet. By converting analog audio signals into digital packets for transmission over the internet, it enables inexpensive, often free, communication worldwide, especially when using existing internet infrastructure.