Transport protocols such as TCP/IP are the foundation of computing and communications. But transport protocols change from time to time. So Quic is viewed as a replacement for TCP that also provides reduced latency performance.
The “layers” design of data communications ensures that TCP functions and IP functions can be updated or changed without upsetting the whole transport system. IP obtains and defines the address of the application or device the data must be sent to.
TCP is responsible for transporting and routing data through the network architecture and ensuring it gets delivered to the destination application or device that IP has defined. But other protocols can be used in place of TCP, such as UDP.
It might be quite fanciful at this point to speculate on a replacement for TCP/IP as the global standard for communications. It is not speculation that QUIC can replace TCP.
Other proposals have been floated, but have not gotten traction. Most such proposals involve modifying TCP, though at least one proposal suggests replacing IP.
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