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Cloud Digital Leader Practice Question: Evaluating whether to use a content delivery…
A company is evaluating whether to use a content delivery network (CDN) for its e-commerce website. Which scenario would most benefit from CDN implementation?
⚠ Common exam trap
The GCDL exam often tests the misconception that CDNs are a universal performance solution, but the trap here is that CDNs only benefit cacheable, static, or geographically distributed content, not real-time or localized traffic.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
An e-commerce site with global customers that serves high-resolution product images and videos, where page load speed directly affects conversion rates
A CDN caches static content like high-resolution images and videos at edge servers geographically closer to users, reducing latency and improving page load speed. For an e-commerce site with global customers, faster load times directly boost conversion rates, making CDN implementation highly beneficial.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A small business whose customers are all located within 10 kilometers of the company's single data center
Why it's wrong here
When all customers are within 10 km of the origin, the round-trip network latency is already sub-millisecond, making the marginal latency reduction from a CDN edge negligible. CDN performance gains come from caching content closer to users who are geographically far away; here, the origin is already 'close enough.' Page load speed in this scenario is more likely limited by server processing, database queries, or front-end rendering, not by network distance. Deploying a CDN would introduce third-party dependency and configuration overhead with virtually no measurable impact on user experience.
- ✓
An e-commerce site with global customers that serves high-resolution product images and videos, where page load speed directly affects conversion rates
Why this is correct
This is the ideal CDN scenario: geographically distributed users, highly cacheable content (product images and videos), and a business metric (conversion rate) that is demonstrably sensitive to latency. CDN edges serve cached content locally, dramatically reducing page load times for international visitors.
- ✗
A real-time financial trading application that requires unique, uncacheable price data delivered to a single city's traders
Why it's wrong here
A CDN accelerates content by serving cached copies from edge locations near users. Real-time financial price data is unique per request and prohibited from caching, so every query must still travel to the origin server; this creates a cache miss on every request. Because all traders sit in a single city, there is no geographic latency gap for a CDN to close. The extra CDN hop (e.g., TLS termination and routing) would actually add overhead while providing zero performance benefit.
- ✗
An internal HR system used exclusively by employees in the company's headquarters
Why it's wrong here
Employees at headquarters are already on the same corporate LAN or low-latency private network as the HR application's data center, so the network distance to origin is minimal. CDN edges only help when users are geographically dispersed; here they are not, so catch-serve would add unnecessary third-party hops. Additionally, routing HR data through an external CDN raises data-privacy concerns (e.g., payroll, PII) and egress costs without any latency advantage. An internal system is better served by the existing local infrastructure.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This GCDL practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the GCDL exam.