A content delivery network (CDN) is a system of distributed servers that deliver web content to users based on their geographic locations. It evolved in 1998 to cache files across the internet for fast delivery of digital content like videos and websites. A CDN uses multiple server locations and peering connections to provide fast content delivery through optimized routing. It reduces load on origin servers and enhances quality of service for users. While CDNs provide advantages like reliability and efficiency, challenges remain around technical issues, competitive pressures, and legal compliance with copyrighted content.

1. CONTENT DELIVERY NETWORK
DIMPLE BADIANI
008081710

2. What is a CDN?
 A network of servers delivering content on behalf of
an origin site
 Developed to cache files across the internet
First evolved in 1998
1:Economy-based Content
Replication for Peering
Content Delivery
Networks[2]

3. 2:Services provided by
CDN[2]
Economy-based Content
Replication for Peering
Content Delivery
Networks[2]
 Fast delivery of any digital content, including static
contents, streaming media and varying content
services
 The sources of content are large enterprises, web
service providers, media companies, news
broadcasters, etc.
 The client interacts with the CDN specifying the
content request through cell phone, smart
phone, PDA, laptop, etc.

4. Evolution of CDN technologies
 Highly distributed CDN
 Big data center CDN
 P2P CDN
 Cloud CDN

5. P2P CDN
 A P2P CDN is a system in which the users get
together to forward contents so that the load at a
server is reduced
 Popular due to rapid growth in demand for
online video and industrial effects
 To avoid network congestions and to improve
performance, P2P techniques can be used to
extend the CDN peering system as an adaptive
CDN

6. Peering initiatives
 DNS approach : directs users to replica
nodes, reducing stress on origin servers
 Providing content delivery by end-user demands
 Server to server peering via HTTP or DNS

7. Advantages
 Quality of service enhanced
 More reliable
 Efficient delivery of content
 Reduced costs with over-provisioning and
provide high quality services

8. Limitations
 Technical and non-technical challenges that
could hinder the growth
 For instance, nature of CDN to gain competitive
advantage in market and legal issues like
copyrighted content blocks use of CDN in
commercial domain

9. Future work & Conclusions
 Community-based CDNs
 Driven by the common people or the average end-users
 Technological features include autonomic composition
and content delivery
 Main focus on meeting Quality of Experience of endusers
 Also researchers have come up with recent innovations
such as P4P, portal for P2P to communicate with
network providers, and new traffic engineering models
for cooperative content distribution

10. References
 Aioffi, W. M., Mateus, G. R., Almeida, J. M., and Loureiro, A. A. F. Dynamic
content distribution for mobile enterprise networks. IEEE Journal on
Selected Areas on Communication, 23(10), 2005.
• R. Buyya, A. M. K. Pathan, J. Broberg, and Z. Tari, A Case for Peering of
Content Delivery Networks, IEEE Distributed Systems Online, Vol. 7, No.
10, Los Alamitos, CA, USA, Oct. 2006
• Hao Yin and Xuening Liu, Content Delivery Networks: A Bridge between
Emerging Applications and Future IP Networks. IEEE
network, July/August, 2010
• Wikipedia, Content Delivery
Network, http://en.wikipedia.org/wiki/Content_delivery_network#Conten
t_networking_techniques