Internet Backbone What is the Internet Backbone? The internet backbone is the core infrastructure that provides high-speed, large-capacity data routes connecting major networks and facilitating global communication. Explanation Composed of high-capacity fibre optic cables and routers, the internet backbone handles the majority of internet traffic. It links regional networks and ISPs to ensure seamless data transmission worldwide. Practical Example of the Internet Backbone A multinational organisation depends on the internet backbone to maintain uninterrupted communication and data sharing across its global offices.