Final answer:
Data sharing is not a disadvantage of an in-house microcomputer network; rather, it is a key advantage. Keeping the system up to date, having a network manager, and initial installation costs are the actual disadvantages. The correct answer is C.
Step-by-step explanation:
When considering the question of what is not a disadvantage of an in-house microcomputer network, option B, Data sharing, stands out as the attribute that is actually an advantage. Implementing a microcomputer network facilitates the sharing of resources such as files, software, and hardware among different users within the network. This interconnected environment can greatly enhance collaboration and efficiency within an organization or group.
On the other hand, options A, C, and D are indeed disadvantages associated with in-house microcomputer networks. Keeping the system up to date (option A) can be a challenge as technology rapidly evolves, requiring regular updates and maintenance.
Network manager needed (option C) highlights the requirement for a dedicated individual or team to manage and troubleshoot the network, which signifies an additional cost in terms of hiring and training personnel. Lastly, Initial installation cost (option D) is a factor that can be significant, as setting up a microcomputer network involves purchasing hardware and software, as well as potentially investing in infrastructure to support the network.