A network is a collection of data communication hardware, computers, data communication software and data communication media, all connected in a meaningful way to allow users to share information, resources and equipment.
A star network is a network where each machine is connected to a central machine, called a server. The server holds all the software, and the other machines, called nodes, request the software from it.
Since the server receives all the requests, it can handle them one by one, and there are no data crashes.
All transactions entering the system from on-line screens will be placed on log (or journal) transaction files. These are located on a smaller, second hard disk within the server computer. If there is a head crash or other problem on the main hard disk, the backup files would still exist. The format of the log files is
E – 2 Date Time Computer ID User ID Backup Type Result 2010/04/01 12:00 AM Dot-PC DMatrix Full Completed 2010/04/01 12:00 PM Dot-PC DMatrix Incremental Completed 2010/04/02 12:00 AM Dot-PC DMatrix Incremental Completed 2010/04/02 12:00 PM Dot-PC DMatrix Incremental Failed 2010/04/03 12:00 AM Dot-PC DMatrix Full Completed 2010/04/03 12:00 PM Dot-PC DMatrix Incremental Completed
Question: Explain in a paragraph why a phased conversion would be used to install the computer system
E – 5 Answer : A phased conversion is the best method since the system has several major subsystems. Hardware records and programs must be installed first because software records reference them. The phased conversion provides data entry personnel time to update records with additional data elements not stored in the old system