Fast Ethernet
StockPhoto
Archive1 Archive2
2094n24
Figure 7-4. Initial Network Design
Each departmental stack consists of one MicroMMAC-24E and one or more SEH-24 stackable hubs. In the initial configuration, the MicroMMAC-24Es have been configured with EPIM-A modules, which provide AUI ports for connection to a standard Ethernet AUI cable. These AUI cables are then connected to thick coaxial cable transceivers that are connected to the coaxial cable backbone.
This arrangement is currently suffering from slow network response times and poor throughput during normal working hours. The thick coaxial cable backbone is also quite difficult to monitor for errors, and any failures or performance losses are exceedingly difficult to troubleshoot.
Access to the three shared file servers (Archive1, Archive2, and StockPhoto) is required by all departments, and users have been complaining about the length of time necessary to place and retrieve files using these servers.
The Network Designer has already examined the distances involved in the facility, and has determined that the Fast Ethernet network implementation will need to use multimode fiber optics as a connection media in order to properly manage the distances involved in the network.
As all of the devices in the selection field have similar operational qualities with regard to management, expandability, interconnection, and price, the only decisions that need to be made for the selection of a central Fast Ethernet switch are those of media and port count.
Fast Ethernet Workgroup Design |
