CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 101

appen_a.fm Page 969 Tuesday, May 20, 2003 4:54 PM Case Study: FARB Software Development, Ltd.: Network Design and Implementation 969 Hints You can find the answers to these questions at the conclusion of Appendix C, “Check Your Understanding Answer Key.” Recommendations for network equipment Look at page 1 of FloorPlan1-Desk-Assignments-building floor1 (ground floor) Work through the following questions: What is the purpose of this floor? What door will workers move freight through? What doors will visitors come in? Where are visitors most likely to go after they sign in? Where would you consider using wireless technology? appen_a.fm Page 970 Tuesday, May 20, 2003 4:54 PM 970 Appendix A: Structured Cabling If your department someday is tasked with wiring IP security cameras, what areas would you want to keep under surveillance? From where does the telephone company serve this building? What kind of lock should it have? Would the POP be a good place for the servers? If it is determined that the server room must exist separate from the POP, what consid-erations should guide its location? Could you install the risers in the POP? appen_a.fm Page 971 Tuesday, May 20, 2003 4:54 PM Case Study: FARB Software Development, Ltd.: Network Design and Implementation 971 Where might you install the risers? The horizontal cabling always should go parallel to walls. Getting to Room 1.2 while staying parallel to walls makes a cable run of how many meters? Is this useable? Floor 2 Floor 2 is dense with offices. It also contains the bottom floor of an auditorium. Not only would the auditorium be a possible candidate for wireless, but it also might affect the routing of wires because it extends several floors in height. Where might you put the telecommunications room on Floor 2? You might consider using two of them. Floor 3 Floor 3 has large unplanned spaces in Rooms 3.1 and 3.2. If you place the telecommu-nications room in Room 3.10, how can you serve these spaces, especially the far side of Room 3.2? appen_a.fm Page 972 Tuesday, May 20, 2003 4:54 PM 972 Appendix A: Structured Cabling Floor 4 You notice a large deck on Floor 4, as well as a banquet area with a piano. What would you need to provide network connectivity to this area? Where will you put the TR? You are now prepared to go to work. Count up the number of desks that would be served by each of these telecommunications rooms. Multiply by two outlets per desk. Divide this number by 16, round up as required, and order that many 16-port switches. That is your first item for the network equipment list. You will need rack frames to support those switches. Order two frames per room to start. Order patch panels to cover the number of specified lines. Remember that there is a certain amount of network equipment, such as, switches and routers that must fit in these TRs. To calculate accurate totals, consider entering this information into a spreadsheet. Network Cabling You determined how many work-area outlets you needed for each TR in Step 1. Use cabling of a high grade, Category 5e or greater. Using a ruler, map out the routes for these runs and then pick off the dimensions. Add them all up, round up to the nearest 1000, add 1000, and then divide by 1000. This is how much cable (1000-foot boxes) you need. It is important to pull cable efficiently. Avoid trying to get by with too few boxes or reels or else it may be necessary to duplicate runs. Pulling new cable over existing cables may result in damaging the cable that was pulled earlier. There is a trick here. Look at drawings called FloorPlan2-Plumbing-and-HVAC-building floor4. This shows the water and air-conditioning duct work. Notice that there is both supply and return air. The ceiling is not a plenum ceiling. You can specify a cable that is not plenum or riser-rated. This will result in considerable savings. appen_a.fm Page 973 Tuesday, May 20, 2003 4:54 PM Summary 973 Construction Requirements You determined that you needed risers between each floor. This requires coring and requires that the bottom floor will pass through the mechanical space. This will require conduit. You also modified some rooms on the fourth floor by adding the TR. Next Steps You now are prepared to work your way through most of the rest of the case study. Have fun. Relax. Remember that the thinking and planning and false starts and discus-sion with teammates is where the true value of this exercise lies. Summary The standards are written in a way that will promote performance. Following stan-dards also tends to unify the methods of construction and installation. For instance, the point at which a telecommunications utility enters the premises almost always is referred to as an entrance facility (EF). The point at which responsibility for the lines and equipment transfers from the network provider to the user is called the point of demarcation, or the demarcation point. The EF and the demarc usually are installed in a room created for that purpose, called a telecommunications room (TR). A TR can have one of several functions. A main cross-connect (MC) distributes the signals to one or more intermediate cross-connects (IC). These, in turn, pass the signal to one or more horizontal cross-connects (HC), which deliver the signal to the area near the end user, called the work area. Work must be performed in a way that does not injure workers, the public, or the envi-ronment. Often this requires marking off the work area with signs or cones to warn passersby. Also, ladder safety is an important practice. Ensure that ladders are in good condition, with no loose or broken portions. When deploying a straight ladder, secure it, if possible, near the point where it contacts a structure. If possible, have someone guard the base of the ladder, and by all means make sure that no one can open a door and knock you off of it. In the case of a stepladder, make sure that the feet firmly con-tact the ground and that the spreaders are fully extended and latched. Do not use a stepladder as a straight one. Never stand on the very top of any ladder. Cabling and wiring require tools adapted to the craft, and installers are well advised to use them and not get by with substitutes. Stripping tools take the insulation off pieces of wire, often in multiple levels to accommodate installing connectors. Cutting tools cut off pieces of wire, often in a way that does not compress the inside of the wires. A ... - tailieumienphi.vn