Different types of connectors for CCTV and IP applications. The most common is the BNC connector. There are several types of BNC connectors but the most common are twist on, crimp on, and compression. The twist style are the easiest to use since they do not require any tools to install. Twist on connectors are recomended for DIYers. Crimp and compression are recommended for security camera installers. IP cameras require ethernet cable which use RJ45 connectors. RJ45 connectors come in several styles like the BNC connectors. The most common is the crimp on RJ45 module.