Internet Layer

The internet layer is one of the layers of the internet protocol suite, often called TCP/IP, which describes how data travels across the internet. Its job is to move packets of data from a source computer to a destination, possibly across many separate networks, by giving each device an address and choosing routes through routers. The main protocol at this layer is the Internet Protocol, in its version 4 and version 6 forms, supported by others such as ICMP, used for error messages. It sits above the link layer, which handles local connections such as Wi-Fi or Ethernet, and below the transport layer, where protocols such as TCP make sure data arrives complete and in order. It does not guarantee delivery. Blockchain networks, peer-to-peer systems and online internet banking all rely on it, and an internet service provider carries this traffic for its customers.