Cloud CDN integration in GCP - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Cloud CDN in Google Cloud Platform?

Cloud CDN (Content Delivery Network) is a service that caches content at locations close to users worldwide to reduce latency and improve load times.

beginner

How does Cloud CDN improve website performance?

By caching static and dynamic content at edge locations near users, Cloud CDN reduces the distance data travels, lowering latency and speeding up content delivery.

intermediate

What is the role of a backend service in Cloud CDN integration?

The backend service connects Cloud CDN to your origin servers (like Compute Engine or Cloud Storage), serving content that is not cached or refreshing cached content.

intermediate

Which HTTP headers are important for controlling Cloud CDN caching behavior?

Headers like Cache-Control, Expires, and Vary help Cloud CDN decide how long to cache content and when to revalidate it with the origin.

advanced

What is a cache key in Cloud CDN and why is it important?

A cache key defines how Cloud CDN identifies unique content to cache. It usually includes the URL, query parameters, and headers. Proper cache keys ensure correct content delivery and cache efficiency.

What is the primary benefit of using Cloud CDN?

A Reducing latency by caching content near users

B Increasing server CPU power

C Encrypting data at rest

D Managing user authentication

Cloud CDN reduces latency by caching content at edge locations close to users.

Which Google Cloud service acts as the origin for Cloud CDN content?

A BigQuery

B Cloud Pub/Sub

C Cloud Storage or Compute Engine backend services

D Cloud Functions

Cloud Storage buckets or Compute Engine instances serve as origin backends for Cloud CDN.

Which HTTP header controls how long Cloud CDN caches content?

A Cache-Control

B Authorization

C Content-Type

D User-Agent

Cache-Control header specifies caching policies for Cloud CDN.

What happens if Cloud CDN does not find content in its cache?

A It redirects to another CDN

B It fetches content from the origin backend

C It returns an error to the user

D It serves stale content

Cloud CDN fetches content from the origin backend when cache misses occur.

Which of these is NOT a factor in Cloud CDN cache key by default?

A URL path

B HTTP headers

C Query parameters

D Request body

Request body is not part of the cache key; cache keys use URL, query parameters, and headers.

Explain how Cloud CDN integrates with backend services in GCP to deliver content efficiently.

Think about how content flows from origin to user through Cloud CDN.

Describe the importance of cache keys in Cloud CDN and how they affect content delivery.

Consider how Cloud CDN decides what content to store and serve.