CDN Architecture & Components 2

Question 1

What is the primary role of an Anycast network in CDN architecture?

Accepted Answer

Route users to the nearest PoP based on network topology

Answer

Anycast assigns the same IP address to multiple PoPs so BGP routing automatically directs users to the topologically nearest node.

Question 2

Which CDN component is responsible for translating a user's hostname into the IP address of the optimal edge server?

Accepted Answer

Global Traffic Manager (GTM) / DNS-based routing

Answer

A Global Traffic Manager uses DNS responses to steer clients to the best-performing edge node at request time.

Question 3

In a multi-tier CDN hierarchy, what distinguishes a 'parent' cache from an 'edge' cache?

Accepted Answer

Edge caches fill cache misses from parent caches rather than the origin

Answer

Parent (mid-tier) caches sit between edge nodes and the origin, absorbing cache-miss traffic so the origin receives far fewer requests.

Question 4

What is 'cache shielding' (also called origin shielding) designed to accomplish?

Accepted Answer

Funnel all cache misses through a single upstream node to protect the origin

Answer

Origin shielding collapses cache misses from many edge nodes into a single shield PoP, drastically reducing origin load.

Question 5

Which protocol feature allows a CDN edge server to maintain a single persistent connection to the origin while serving many concurrent client requests?

Accepted Answer

Connection multiplexing / HTTP/2 streams

Answer

HTTP/2 multiplexing lets multiple requests share one TCP connection, so the edge opens fewer connections to the origin.

(CDN) Content Delivery Network Certification Practice Test

(CDN) Content Delivery Network Certification Practice Test

CDN Architecture & Components 2