Software which controls the communication in networks.Group of answer choicesVPNTelnetProtocolITU-T G.hn

The correct answer from the provided options that refers to software controlling communication in networks is "Protocol."

Explanation:

1. Protocol: In networking, a protocol is a set of rules that governs the communication between devices. It defines how data is transmitted over the network, ensuring that devices can communicate with each other effectively.

2. VPN: A Virtual Private Network (VPN) is a service that creates a secure connection over the internet, but it is not software that controls communication in a broader sense.

3. Telnet: While Telnet is a protocol used for remote communication over the internet, it is more specific and does not represent the broader category of software that controls network communications.

4. ITU-T G.hn: This is a set of standards developed by the International Telecommunication Union (ITU) for home networking using existing wiring, but it doesn’t refer specifically to controlling communications like a protocol.

In summary, "Protocol" is the best choice as it encompasses the rules and standards that enable communication within networks.