Network Layer: "data plane"

4.1 network layer: overview

4.2 what's inside a router

input ports

switching

output ports

packet buffering, scheduling

4.3 IP: the internet protocol

IPv4, addressing

IP address: 32-bit identifier associated with each host or router interface

subnet

CIDR

DHCP(host part)

(subnet part)

NAT, IPv6

4.4 Generalized Forwarding, SDN

4.5 Middle boxes