When you see open any image on Facebook it is opened in the same window. Right ? But when you open it in a new tab (Right Click -> Open Image In A New Tab) you will see fbcdn.net in your URL bar. So what is fbcdn.net ? Why facebook is using other domain name for their photos ? If you already know then read other tutorials and if you don't then read on...
Facebook uses fbcdn.net as CDN. This is why your photos are uploaded to fbcdn and not to facebook. So whenever you request to view a photo on facebook, your request is actually sent to the nearest possible Akamai server. This server returns the requested photo. And since its the nearest possible server, you will get the requested photo with a minimum time delay.
Whats The Matter Here ?
The photos which you upload to facebook, are actually being uploaded to fbcdn.net. Now the question arises, What is fbcdn.net and Why your photos are hosted on fbcdn.net ?What Is fbcdn.net ?
Here facebook is actually using Akamai Technologies CND (Content Delivery Network). So this is your final answer if you know what is a CND and how it works. Others read on..
What is a CDN ?
According to Wikipedia -
"A content delivery network or content distribution network (CDN) is a large distributed system of servers deployed in multiple data centers across the Internet. The goal of a CDN is to serve content to end-users with high availability and high performance".So simply a CDN (content delivery network) will receive your data and place it on several different servers all over the world. This makes that particular content to load faster for anyone who wants to access it. This is because the content will be delivered to the end user from the nearest possible server holding the content.
Why Facebook Photos Are Uploaded To fbcdn.net ?
Akamai has several CDN networks, where fbcdn.net is one of the CDN. Facebook is a large network and it has to deliver content at much faster speeds to each and every user. And to do so, it requires a CDN.Facebook uses fbcdn.net as CDN. This is why your photos are uploaded to fbcdn and not to facebook. So whenever you request to view a photo on facebook, your request is actually sent to the nearest possible Akamai server. This server returns the requested photo. And since its the nearest possible server, you will get the requested photo with a minimum time delay.
Facebook is also using Akamaihd.net and may be some other URL also.
Is any of my infor (FB) being captured as well? Such as user name and IP address?
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DeleteI'd like to know that too! And, is this where FB users get phoney photos for their FB profile???
ReplyDeleteThe article contains a mistake, there's CND instead of CDN in the "What Is fbcdn.net ?" section...
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This comment has been removed by the author.
ReplyDeleteBoth fbcdn and Akamai use Markmonitor as a domain Registrar.
ReplyDeleteWhois.net is the IANA Authority for these inquiries. Officially I use it to see if a domain is expiring and may be purchased, like BlogSpot expires 7-31-16.
Markmonitor is owned by Reuters/AP/Rothschild. Wikipedia, also registrared to Markmonitor, removed this HUGE piece of information about Akamai:
"Post 9/11, laws permit US Federal Government agencies (including NSA, HomeLand Security) to view and download content from Akamai for the use of National Screening. Akamai is one of many collaborative sites that supply the NSA with data for analysis".
I snapped a screen capture of it, and a week later it was removed from Wikipedia, luck!
Akamai 'officially' provides product updates, patches, etcs for Google, Adobe and Microsoft. Would any of these three corporation require a 3rd party for anything? Doubtful. As a Network Engineer and Firewall expert, if I block all of Akamai's Class A,B IP blocks, I will have created a Denial Of Service on my own network, they have made themselves NECESSARY, and not with positive intentions. In 15 years now of having our 4th Bill of Rights infringed to catch 'terrorists', they have caught 0, it was never the intention, Snowden told us all about it ;)
-Troy Network Engineer & Network Security Officer for a Law Enforcement Agency.
Can you use this technology to place a person in a photo in a setting when they are not really
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Can you use this technology to place a person in a photo in a setting when they are not really
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Sir but photo is not opened in fbcdn.net, i click on it.
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So can I also remove my picture in fbcdn if I have deleted my photo in facebook?
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