Content Delivery Networks (CDN) in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the main purpose of a CDN.

Computer Networks

A CDN primarily helps to [1] content closer to users.

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Acompress

Bcache

Cencrypt

Dgenerate

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'encrypt' or 'generate' which are not primary CDN functions.

A CDN caches content closer to users to reduce latency and improve load times.

2fill in blank

medium

Complete the code to describe the role of edge servers in a CDN.

Computer Networks

Edge servers in a CDN are responsible for [1] user requests locally.

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Aserving

Bmonitoring

Clogging

Drouting

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing serving with routing or monitoring.

Edge servers serve cached content directly to users to reduce load on origin servers.

3fill in blank

hard

Fix the error in the statement about CDN benefits.

Computer Networks

A CDN reduces [1] by distributing traffic across multiple servers.

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Alatency

Bbandwidth

Cdowntime

Dsecurity

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing bandwidth or downtime which are not directly reduced by CDN.

CDNs reduce latency by serving content from nearby servers, improving speed.

4fill in blank

hard

Fill both blanks to complete the CDN request flow.

Computer Networks

User requests content → DNS [1] to nearest edge server → Edge server [2] content if cached.

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Aresolves

Bforwards

Cserves

Dblocks

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'forwards' or 'blocks' which do not fit the flow.

DNS resolves the user's request to the nearest edge server, which serves cached content.

5fill in blank

hard

Fill all three blanks to complete the CDN cache update process.

Computer Networks

When content changes, the origin server [1] a purge request → CDN [2] cached content → Edge servers [3] new content from origin.

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Asends

Binvalidates

Cfetch

Dstores

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up 'stores' with 'invalidates' or 'fetch'.

The origin server sends a purge request, CDN invalidates cached content, and edge servers fetch fresh content.