Tor a great god please help me! I am tor application layer packet already understand, have a question is how these packets eventually spread to other routers, the application layer data to the TLS transport layer network layer keep adding the head, would like to ask the packets in the network layer structure is? There is a network layer protocol of his own head or tor at the network layer also using TCP/IP packets in the network layer structure?? Give advice or comments please!!!!!

In addition, the network layer in the graph package is put forward in 98 the first generation of onion routing network layer package, now use should not be this Tor it? Which the network layer of the great god know Tor package structure, trouble to inform, thank you!!!!!