Chapter 17
Networking Components
This chapter covers the following topics:
What Are Networks?: This section describes what a
network is and introduces the types of networks.
Elements of Networks: This section provides an
overview of various networking elements, including
hubs, switches, routers, and VLANs.
Software-Defined Networking: This section
provides an overview of the fundamentals of the
control, data, and management planes.
Over the past several decades, Cisco has built the
backbone of what we call the internet today and has
developed and created networks big and small,
including enterprise networks and service provider
networks. In Chapter 16, “Network Fundamentals,”
you learned some networking basics. This chapter
covers networking components, such as the following:
Networking elements such as hubs, switches, and routers
Network device functions, including the management, data, and control
planes
Software-defined networking“DO I KNOW THIS ALREADY?” QUIZ
The “Do I Know This Already?” quiz allows you to assess
whether you should read this entire chapter thoroughly
or jump to the “Exam Preparation Tasks” section. If you
are in doubt about your answers to these questions or
your own assessment of your knowledge of the topics,