TCP/IP was a major change in networking, because all telephone companies were used to have reliability at the link layer - that's how you do a telephone network. But TCP/IP is much more scalable, because it has a reliability layer that is not dependent on the link layer.
TCP/IP was a major change in networking, because all telephone companies were used to have reliability at the link layer - that's how you do a telephone network. But TCP/IP is much more scalable, because it has a reliability layer that is not dependent on the link layer.