Chapter 1

1:	Name the two planes of operation in a modern router.
A:	The two planes of operation are Control and Data planes.
2:	IP forwarding and IP routing are related concepts. What is the difference between them?
A:	IP forwarding is the process by which a router moves a packet from the ingress port to the egress port. This process is sometimes called packet switching or routing. However, IP routing involves more than just switching of packets. IP routing is the much broader process of exchanging routing information in a domain to build the routing tables required to make the forwarding decisions.
3:	Name the three common classifications of IP routing protocols.
A:	The three common classifications are classless and classful; intradomain and interdomain; and distance vector and link state.
4:	Name three basic packet-switching mechanisms supported in Cisco IOS Software.
A:	Process switching, fast switching, and Cisco Express Forwarding.
5:	What is the critical shortcoming of the IPv4 architecture that IPv6 tries to address and how it is addressed?
A:	IPv6 is intended to provide a larger address space than IPv4. IPv6 addresses are 128-bits long compared to the 32-bit IPv4 addresses.