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Centralized & distributed models, and pointing devices.

1. Computers can be connected using a centralized or distributed model. Describe each of these two models.

2. A pointing device allows you to manipulate an on-screen pointer and other screen-based graphical controls. Briefly describe each of these popular pointing devices: trackpads, trackballs, and joysticks.

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1. Computers can be connected using a centralized or distributed model. Describe each of these two models.

In a centralized computer system, almost all communications that take place on the system travel through the same centralized hub. This is advantageous because it doesn't consume resources in the same way that a decentralized system does, which makes the centralized system quicker because it is less of a strain on the system's resources. In the centralized model, all data is centralized to the main point, which increases data integrity. In the centralized database architecture, each workstation is connected through the central server to the main hub. The database is run on a central server and each part of the centralized database is critical to its overall operation. The biggest disadvantage is the "single point of failure issue" (Quality by Vision, 2012). All parts of the network must work together and be able to access each other at all given times, or it will lead to an immediate system failure.

In the distributed ...

Solution Summary

The solution provides detailed discussions on both questions presented. The first question asked is, Computers can be connected using a centralized or distributed model. Describe each of these two models.

The second question asked is, A pointing device allows you to manipulate an on-screen pointer and other screen-based graphical controls. Briefly describe each of these popular pointing devices: trackpads, trackballs, and joysticks.

References are included for both questions.

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