Which of the following is the correct order of the evolution of the modern IT infrastructure?

Question

BlackTom AI · Accepted Answer

The question asks for the correct chronological progression of the evolution of the modern IT infrastructure. 
Option 1 presents the sequence as: Stand-alone mainframes, mainframe and dumb terminals, standalone PCs, LANs, enterprise computing, cloud and mobile computing. This tracks the historical development: centralized mainframes used with dumb terminals, then the shift to personal computers (stand-alone PCs), followed by local area networks (LANs) enabling distributed resources, then the era of enterprise computing with integrated, organization-wide systems, and finally cloud and mobile computing enabling scalable, on-demand resources and access from anywhere. 
Option 2 changes the order by placing LANs before standalone PCs, which semantically implies networks existed before personal computers became widespread, contradicting the actual historical timeline where PCs preceded widespread LAN adoption in many contexts. 
Option 3 moves cloud and mobile computing ahead of enterprise computing, suggesting cloud/mobile arrived before broad, centralized enterprise systems—this departs from the typical sequence where enterprise computing matured before cloud/ mobile models became dominant. 
Option 4 also misplaces the order by placing cloud and mobile computing before enterprise computing, again implying an earlier emergence of cloud/mobile in relation to established enterprise infrastructures, which is not aligned with the conventional historical progression. 
In sum, the first option aligns with the widely accepted historical ladder: centralized mainframes and terminals → PCs → LANs → enterprise-scale systems → cloud and mobile platforms, whereas options 2–4 introduce incorrect temporal relationships among these stages. 
Therefore, option 1 is the correct choice, while options 2–4 present inaccurate evolutionary orderings due to swapped or premature stages.

Which of the following is the correct order of the evolution of the modern IT infrastructure?

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