When i first started in CCTV cameras were quite basic point and shoot devices that connected via coaxial cable, required seperate power supplied and internet wizardry to  make them work to their full potential. Port forwarding routers, creating dynamic dns portals and configuring access points. In todays world the same result can be acheived with QR codes and built in software of the kit you buy. Everything now runs on the IP protocol and todays systems can even be integrated with a smart home literally at the touch of a button.