tailieunhanh - Ethernet Networking- P4

Ethernet Networking- P4:One of the biggest problems when discussing networking is knowing where to start. The subject of computer networks is one of those areas for which you have to "know everything to do anything." Usually, the easiest way to ease into the topic is to begin with some basic networking terminology and then look at exactly what it means when we use the word Ethernet. | 78 Creating Network Segments to the network. A UTP patch cable a short length of cable with an RJ-45 plug on the end runs from each computer to the wall jack. In most cases you want to run the patch cables under carpeting or from a desktop directly to a wall so that people are less likely to trip. One hopes that common sense prevails in all such things. . Figure 4-19 An office floor plan showing network wiring and the wiring closet Where Do You Put It Wiring Closets Walls Floors and Ceilings Oh My 79 Note The symbol that appears on some lines in the diagram indicates that the line represents UTP wiring. A file server and a Fast Ethernet switch are housed in a wiring closet. UTP cabling runs from each wall outlet above a dropped ceiling and into the wiring closet which is secured with some type of smart lock. A smart lock at the very least supports giving each person who should have access to the room a different entry code and records when each code is used to enter and exit. The UTP cabling that runs from the wall jacks to the switch has RJ-45 plugs at the ends that plug into the switch. The cables are wired into connectors that are then inserted into the wall plates. The cables are run in the ceiling space above the ceiling tiles and dropped down the wall spaces to where the wall plates will be attached. Is this a do-it-yourself job That depends on how comfortable you are with climbing up and down ladders to run the cabling in the ceiling and how comfortable you are with wiring the connectors. For details on the wiring process see the appendix to this chapter. If you won t be involved with the hands-on wiring process you can just skip that material. What can you do if you don t have a dropped ceiling You will need to run the cables along the floor or through the attic. You can hide cables under carpets or use cable protectors that you can purchase the latter allows the cable to lie on top of the floor regardless of its type. As an example look at the small piece