Upon completion of this chapter you will able to: Explain how networks affect the way we interact, learn, work and play Describe how networks support communication Explain the concept of a converged network Describe the four basic requirements of a reliable network Explain the use of network devices Compare the devices and topologies of a LAN to the devices and topologies of a WAN Explain the basic structure of the Internet Explain how LANs and WANs interconnected to the Internet Describe the impact of BYOD, online collaboration, video, and cloud computing on a business network Explain how networking technologies are changing the home environment Identify some basic security threats and solution for both small and large networks Explain how the three Cisco enterprise architectures work to meet the needs of the evolving network environment