In a multitiered network:

Question

BlackTom AI · Accepted Answer

Multitiered network architecture divides application functionality into distinct layers (tiers) such as presentation, application/business logic, and data/storage, with each tier typically implemented on separate servers. This separation enables load distribution, scalability, maintainability, and easier updates.

1. Relevant knowledge points and concepts
- N-tier (multitier) architecture: applications are split into multiple server-based tiers (commonly three-tier: client/presentation, application/middle, and database/back-end).  
- Load balancing and separation of concerns: each tier handles specific responsibilities so work is shared across server layers, improving performance and fault isolation.  
- Contrast with centralized, two-tier, and client-centric models to understand differences.

2. Step-by-step reasoning
- Identify what “multitiered network” implies: multiple server tiers cooperating to fulfill requests.  
- Map common tiers: user interface served by the presentation tier, requests and business rules handled by middleware/application servers, persistent data served by database servers.  
- Because tasks are assigned to different tiers, the overall workload is distributed across these server layers rather than concentrated in one location.

3. Intermediate steps and elaboration
- Presentation tier: handles user interaction and forwards requests.  
- Application tier: processes business logic and orchestrates operations.  
- Data tier: stores and retrieves persistent data.  
Each tier runs on separate servers or server clusters, so processing and resource demands are spread across them.

4. Why the correct answer is correct
- The statement “the work of the entire network is balanced over several levels of servers” exactly captures the essence of a multitiered architecture: workload is partitioned and handled by multiple server layers.

5. Why other options are incorrect
- “Centralized”: contradicts multitier distribution; centralized means one location/server.  
- “Processing is handled by multiple, geographically remote clients”: describes distributed client-side processing, not server-tier distribution.  
- “Processing is split equally between clients and servers”: implies two-tier balance; multitier uses several server levels, not an equal client-server split.  
- “Users interface with the server rather than the client”: inaccurate—users typically interact with the presentation client, which then contacts server tiers.

6. Conclusion
The correct answer is: the work of the entire network is balanced over several levels of servers. This matches the provided answer.

In a multitiered network: 单项选择题

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