|  |  | Summary
The focus of this chapter was network design and documentation. You learned that: layer 1 components include: plugs, cable, jacks, and patch panels to finish Layer 1 design, both a logical and a physical topology must be generate layer 2 devices such as switches to reduce congestion and collision domain size layer 3 devices such as routers are used to build scalable internetworks (larger LANs, WANs, networks of networks), or to impose logical structure on the network databases, and other shared resources, as well as the LAN's link to WANs and to the Internet any time you install cable, it is important to document what you have done a wiring closet is a specially designed room used for wiring a data or voice network backbone cabling consists of the backbone cabling runs; intermediate and main cross-connects; mechanical terminations; and patch cords used for backbone-to-backbone cross-connection surge suppressors are an effective means of addressing the problems of surges and spikes Now that you have work through this chapter, you are ready to begin the structured cabling project which is covered in the next chapter.