Today, connectivity to the Internet is easy; you simply get an Ethernet driver and hook up the TCP/IP protocol stack. Then dissimilar network types in remote locations can communicate with each other. However, before the introduction of the TCP/IP model, networks were manually connected but with the TCP/IP stack, the networks can connect themselves up, nice and easy. This eventually caused the Internet to explode, followed by the World Wide Web.
So far, TCP/IP has been a great success. It’s good at moving data and is both robust and scalable. It enables any node to talk to any other node by using a point-to-point communication channel with IP addresses as identifiers for the source and destination. Ideally, a network ships the data bits. You can either name the locations to ship the bits to or name the bits themselves. Today’s TCP/IP protocol architecture picked the first option. Let’s discuss the section option later in the article.