LAN Design Case Study

Jun 21st, 2015
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Alabama State University
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What LAN Technology is to be used? According to Section 1 of requirements doc, Ethernet should be used. This makes sense, since Ethernet is the most widely used LAN technology so equipment should be relatively cheap and it should be easy to find somebody qualified to install the networking media. Also, there are no special requirements here that would be to the advantage of other technologies. Where are the MDF and IDFs to be located? The MDF is marked on the map – it is in a room that is also the telephone POP (point-of-presence). Drawing a circle of radius 100m around the MDF shows (outer circle in the diagram above) that most areas of the school (all except porta-cabin and P.E. building) are within its catchment-area for copper cable if we could lay the cable in a direct line. As a rule of thumb, however, we should use a circle with radius of 50m (inner circle in the diagram above) to allow for indirect pathways requiring a longer run of cable to end points. However, since the wings a

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LAN Design Case Study Sample SolutionLayer 1 DesignWhat LAN Technology is to be used?According to Section 1 of requirements doc, Ethernet should be used. This makes sense, since Ethernet is the most widely used LAN technology so equipment should be relatively cheap and it should be easy to find somebody qualified to install the networking media. Also, there are no special requirements here that would be to the advantage of other technologies.Where are the MDF and IDFs to be located?The MDF is marked on the map it is in a room that is also the telephone POP (point-of-presence). Drawing a circle of radius 100m around the MDF shows (outer circle in the diagram above) that most areas of the school (all except porta-cabin and P.E. building) are within its catchment-area for copper cable if we could lay the cable in a direct line. As a rule of thumb, however, we should use a circle with radius of 50m (inner circle in the diagram above) to allow for indirect pathways requiring a longer run of cable to end points. However, since the wings appear to be separate buildings, as a rule we should put an IDF in each building. Another consideration is that since we are restricted to laying cable that runs between wings through already-installed ducting, we should assume that the ducting has a limited diameter - limiting the number of cable runs that we can put through it so that we are required to put an IDF in each wing, and one in each of the P.E. building and the double

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