hi to all please help me on my problem.... SCENARIO: You are responsible for deciding a physical layer and topology for a small airline company’s network. This company has 80 employees. The physical layout of the building that this company is located in is in Figure A. The information that flows though this company consists mostly of airline reservations. The company is using Microsoft NT Server with a SQL server database running on it. The database is accessed by each of three groups in this Airline. These are Group 1 – Reservation and Booking, Group 2 – Check-in, and Group 3- Administrative. Each group is separated from each of the others by an impenetrable wall, with no access over or through the wall. The only way to physically move anything from one group to another is to go around the wall. The greatest distance between the server and a PC is 80 meters. All three groups have important functions, and no one group can really afford to have delays in receiving information from the server. The Reservation and Bookings staff cannot afford to have the clients wait to book a flight, which may cost lost sales. They also must be able to process persons waiting at the terminal or else flights leave late. Thus they need quick access to the database server. The check-in staff has to be able to quickly access the database on the server to check in the customers, so that flights will not be delayed. The administrative staff has to be able to access the database server quickly to deal with complaints and lost luggage. Because the airline does not run flights constantly, a lot of people tend to be on the network at one time, or very few. Also, the amount of data transferred on the network by each user is relatively small (how much information is really on an airline ticket?) but all the users are continually accessing the network when the flights are running. Only a handful would be continually accessing the network during those times that the flights are not running. Because this is a competitive market, this airline company cannot afford to have the network go down. please please help me...