After
completing this chapter, you will be able to:
* Know exactly how the network layer
moves a segment from the transport layer of an origin host to the transport
layer of the destination host.
* See that the network layer requires the
coordination of each and every host and router in the network.
* Learn the network layer protocols which
are among the most challenging (and therefore interesting!) in the protocol
stack.
* Identify a router as a computer with an
operating system (OS) and hardware designed for the routing process.
