Cloud Digital Leader Why Cloud Technology Can Transform Business Practice Question
A global e-commerce company is moving its user-facing application to Google Cloud to improve performance for customers worldwide. They need low-latency content delivery and fast DNS resolution. Which TWO Google Cloud services should they use? (Choose 2)
⚠ Common exam trap
GCDL often tests the confusion between network connectivity services (Interconnect, Load Balancing) and edge acceleration services (CDN, DNS); candidates pick Interconnect or Load Balancing thinking 'global' means connectivity rather than edge caching and resolution.
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
✓
Cloud CDN
Cloud CDN (A) is correct because it caches the application's static and dynamic content at Google's globally distributed edge points of presence, serving users from the location closest to them and thereby reducing latency for worldwide customers. Cloud DNS (B) is correct because it is Google's highly available, low-latency authoritative DNS service running on the same global anycast network, which delivers fast DNS resolution for the user-facing domain. Cloud Interconnect (C) is not correct here because it provides dedicated private connectivity between an on-premises network and Google Cloud, not edge content delivery or public DNS resolution. Cloud Armor (D) is a WAF/DDoS protection service for filtering malicious traffic, which addresses security rather than latency. Cloud Load Balancing (E) distributes traffic across backends and can complement CDN, but it is not the service that provides edge caching or fast DNS resolution as requested.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Cloud CDN
Why this is correct
Cloud CDN caches static and dynamic content at Google's global edge points of presence, so users retrieve data from a location geographically close to them. This reduces round-trip time, decreases latency, and unloads the origin server, directly improving the performance of a global e-commerce application's page loads and media delivery.
- ✓
Cloud DNS
Why this is correct
Cloud DNS uses anycast routing with servers distributed worldwide to provide low-latency, authoritative DNS resolution. By quickly resolving a domain to the nearest healthy backend IP, it shortens the time to establish the initial connection, which is critical for global users experiencing a fast and responsive e-commerce site.
- ✗
Cloud Interconnect
Why it's wrong here
Cloud Interconnect establishes dedicated physical connections between an on-premises network and Google Cloud, ensuring reliable throughput and lower packet loss for hybrid workloads. However, it does not place content closer to global end users or accelerate public internet traversal, so it has minimal impact on reducing user-facing latency for a geographically distributed e-commerce audience.
- ✗
Cloud Armor
Why it's wrong here
Cloud Armor is a security service that provides DDoS protection and web application firewall rules to filter malicious traffic. While it can inspect requests and enforce policies at Google's edge, it does not cache content, shorten network paths, or resolve DNS faster, so it is not a performance optimization service for global application speed.
- ✗
Cloud Load Balancing
Why it's wrong here
Cloud Load Balancing distributes incoming traffic across multiple backend instances or regions, improving availability and preventing overload on any single resource. However, it does not cache content at edge locations nor accelerate DNS resolution; it only routes existing requests, so by itself it cannot reduce the latency that global users experience when fetching static assets or connecting to the application.
Visual reference
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Related to this question
Learn chapter
Data Security: Encryption and Access Controls
Key term
DNS
DNS is the system that translates human-friendly domain names like example.com into machine-readable IP addresses so computers can find each other on a network.
Key term
DDoS
A DDoS (Distributed Denial-of-Service) attack is a malicious attempt to disrupt normal traffic of a targeted server, service, or network by overwhelming it with a flood of internet traffic from multiple compromised systems.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Google Cloud exam blueprint
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.