This chapter covers the following subjects:
Overview of Network Layer Functions: The first section introduces the concepts of routing, logical addressing, and routing protocols.
IP Addressing: Next, the basics of 32-bit IP addresses are explained, with emphasis on how the organization aids the routing process.
IP Routing: This section explains how hosts and routers decide how to forward a packet.
IP Routing Protocols: This brief section explains the basics of how routing protocols populate each router’s routing tables.
Network Layer Utilities: This section introduces several other functions useful to the overall process of packet delivery.
The OSI physical layer (Layer 1) defines how to transmit bits ...