All, I just read the book
Netty in action. A word
Transport is mentioned in the book like below.
NIO is used in this example because it’s currently the most widely used transport, thanks to its scalability and thoroughgoing asynchrony. But a different transport implementation could be used as well. If you wished to use the OIO transport in your server, you’d specify OioServerSocketChannel and OioEventLoopGroup. We’ll explore transports in greater detail in chapter 4.
What does it mean the