CDN Architecture & Components

Question 1

What is the primary function of a Content Delivery Network (CDN)?

Accepted Answer

Deliver web content globally

Answer

The primary function of a Content Delivery Network (CDN) is to deliver web content, such as images, videos, and web pages, to users across the globe quickly and efficiently. It achieves this by distributing content to servers located closer to end-users. This geographical distribution minimizes latency and improves the loading speed of websites and applications, enhancing the user experience.

Question 2

What are edge servers in a CDN?

Accepted Answer

Servers near users

Answer

Edge servers in a CDN are strategically located servers positioned at the 'edge' of the network, meaning they are geographically closer to the end-users. These servers cache copies of content, allowing them to deliver data with minimal delay. By reducing the physical distance data needs to travel, edge servers significantly improve content loading times and overall website performance.

Question 3

What is the role of origin servers in a CDN?

Accepted Answer

Store original content

Answer

Origin servers in a CDN architecture are the primary source where the original, authoritative versions of web content are stored. When a user requests content, and it's not available in a CDN's edge server cache, the edge server retrieves it from the origin server. This ensures that the CDN always serves the most up-to-date content while offloading direct traffic from the origin.

Question 4

What is caching in a CDN?

Accepted Answer

Storing content near users

Answer

Caching in a CDN refers to the process of storing copies of frequently accessed web content on edge servers that are geographically closer to users. When a user requests content, the CDN checks if a cached version is available on a nearby edge server. This significantly reduces the time it takes for content to reach the user, improving website speed and reducing the load on origin servers.

Question 5

What does latency refer to in CDN performance?

Accepted Answer

Delay in content delivery

Answer

In CDN performance, latency refers to the delay or time lag experienced between a user's request for content and the delivery of that content. High latency can result in slow loading times and a poor user experience. CDNs aim to minimize latency by serving content from edge servers located closer to the user, thereby reducing the physical distance data must travel.

(CDN) Content Delivery Network Certification Practice Test

(CDN) Content Delivery Network Certification Practice Test

CDN Architecture & Components