Danielle is setting up wirelessly connected lights for the team's office space so they can monitor their power usage. During setup, she uses her device to connect to the light bulb's own wi$-$fi like connection. Once the lights have been set up$,$ the wi$-$fi connection is no longer needed, and the lights can be wirelessly connected from Danielle's device. The connection range is up to $100$ meters in open air alone. What type of connection is this?

a$.$

Z$-$Wave

b$.$

Windows Defender Firewall

c$.$

Hash

d$.$

VPN