Yes, security cameras use IP addresses to identify themselves to other digital devices such as a DVR/NVR. If you use an NVR, the recorder itself assigns an IP address to the security camera. Otherwise, you’d have to manually assign a static address to your security camera. Mind you - an NVR uses DHCP (another protocol) to assign dynamic addresses. If you’d like to use a static IP address internally, you’d have to modify the recorder’s settings.