learn content delivery network (cdn) basics
TRANSCRIPT
CDNETWORKS.COM
THE INTERNET
INFRASTRUCTURE
GLOBAL NETWORK SERVERS
NETWORK PERFORMANCE COMPARISONS
SECURITY
OUTLINEAGENDA
CDNETWORKS.COM
THE GLOBAL INTERNET IS COMPLEX
PoP 3
PoP 2
PoP 1
Tier 3 Networks (Multi-homed ISP)
IXC
Tier 1 Networks
Tier 3 Networks(single homed ISP)
Tier 2 ISPs
Global Network Providers
Internet Users
Broadband Providers
Tier 2 Networks
Regional ISPs,
University Networks
Transit
Transit
Transit
Transit
Peering
CDNETWORKS.COM
INTERNET RTT LATENCY
• DISTANCE
• SPEED OF LIGHT
50 ms
150 msLONDON
NEW YORK
500 ms SHANGHAI
GLOBAL INTERNET CHALLENGES
SAN FRANCISCO
CDNETWORKS.COM
GLOBAL INTERNET CHALLENGES
NETWORK PROBLEMS
• NETWORK OF NETWORKS BOTTLENECKS
• PACKET LOSS
• CONGESTION
• RETRANSMISSION
SAN FRANCISCO
USER
CDNETWORKS.COM
MULTIPLE RTTs FOR CONNECTION NEGOTIATION
GLOBAL INTERNET CHALLENGES
INEFFICIENT PROTOCOLS / RTT MULTIPLIER•CHATTY PROTOCOL
•TCP SLOW START
•TENS OF BACK & FORTH ROUND TRIPS
•30-50 RTTs FOR ONLY 1 PAGE
•CONNECTION LOAD AT ORIGIN
SAN FRANCISCO
logo.gif File
USER
CDNETWORKS.COM
GLOBAL INTERNET INFRASTRUCTURE
CDNETWORKS.COM
STATIC CONTENTBase Web Page and graphics
DYNAMIC CONTENTChanging / moving content
2 TYPES OF CONTENT
CDNETWORKS.COM
WITHOUT A CDN
USER
SLOW
Dynamic Content
logo.gif File(Static Content)
BIG.pdf File(Static Content)
ORIGIN
CDNETWORKS.COM
WITH A CDN (STATIC CONTENT)
FAST
logo.gif File(Static Content)
BIG.pdf File(Static Content)
ORIGIN
CDN COPY
USER
CDNETWORKS.COM
WITH A CDN (DYNAMIC CONTENT)
USER
SUPER HIGHWAY“MIDDLE MILE”
Dynamic Content
ORIGIN
CDNETWORKS.COM
WITH CDN (SECURITY)
ORIGIN
USER
Dynamic Content
logo.gif File(Static Content)
BIG.pdf File(Static Content)
CDNETWORKS.COM
KEY TAKEAWAYSGlobal Auction Website Origin
3 Datacenters
CDN (CDNetworks)
GLOBAL INTERNET CHALLENGES – RTT & LATENCY (SLOW)
A CDN BRINGS STATIC CONTENT CLOSER TO USERS
A CDN ACCELERATES DYNAMIC CONTENT
A CDN DEFENDS, ATTACKS & ABSORBS SECURITY THREATS
CDNETWORKS.COM
