|  |  | 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 generated
- Layer 2 devices such as switches 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 worked through this chapter, you are ready to begin the structured cabling project which is covered in the next chapter.