Summary
Whew, this chapter covered quite a bit of information. You learned the difference between a router, a switch (bridge), and a hub and when to use each one. I also covered some devices that you might find in a network today, but not as often, such as VPN concentrators and content filters.
The information I discussed about DNS and DHCP is critical to your success on the Network + exam, and I highly suggest that you reread those sections. I covered how both the DNS and DHCP services work on a network.
In addition to the most common devices, I discussed the specialized network devices mentioned in the Network + objectives. I finished the chapter by discussing collision and broadcast domains in detail as well as how you would use a router, switch, and hub in your networks today.
All of the information in this chapter is fundamental, and you must understand it before moving on to the other chapters in this book.
