Bigcdn

De BISAWiki

Edição de 22h37min de 12 de maio de 2013

Content Distribution Network

 One out of the necessary terms in streaming and online video is the CDN , which would mean content delivery network . But what could be a CDN , exactly ? CDNs are used to rapidly and cost-effectively deliver a variety of content to a lot of end points , whether or not the end points are web browsers , telephones , set-top boxes , or even video game consoles . This document will describe CDNs , look at their history , assess the current market landscape , and finally discuss what CDNs stand for to you .
 CDN : Definitions & Past
 There's not really a general CDN , however for our needs , they belong to 3 elementary categories : those that provide general content material which include , but not constrained to , video delivery ; those that provide on-demand or even pre-recorded/pre-encoded videos ; and those that deliver live video .
 Let's take a look at the variations and similarities between each one of these . All the technologies explained below , from full download to progressive get to streaming to HTTP delivery , are in use today—in a large number of home business models—although a number of have proved more popular when compared with some others .
 Common Use of CDNs
 The trend of CDNs started out before video , and also chances are you've used their solutions if you've downloaded a single software update , bought a song on the iTunes Market , and in many cases enjoyed a visit to a popular website .

Content Deleviry Network

 These general-purpose CDNs perform what's typically called website acceleration . This is generally done ideal by a CDN containing a large number of servers in numerous areas , preferably close to the big connection points between online world providers ( ISPs ) or even within the same files centers just as a popular web page or maybe gaming/application service provider . The CDN caches content , holding a copy of material that could routinely be looked for by a good variety of web searchers .
To fully understand web acceleration , look at it in terms of the marketing pitch that used to accompany those Discs we received in the mail for some dial-up providers . The advertising and marketing pitch provided potential buyers the ability to "turbo boost" of their website browsing experience , at much faster rates of speed than their 56Kpbs modem would allow .
 Accomplishing this was not too difficult , since every internet-bound customer of the dial-up services provider should dial into one out of a number of points of presence ( POPs ) . In cases where a specific document was ask for many times , the supplier would cache that information at 1 , several , or all of its POPs , meaning that any ask for that written content would probably never get out across the costly online network lines but will as an alternative be supplied up from within the support provider's own data cache .
 These days , however , internet acceleration is a bit more complex , while also the most favored ISP in the United States only provides worldwide web connectivity to only about 22% of the total U .S . on the net human population . The CDN bringing articles that are able to be web accelerated needs to cache content at many regions , ending with a need for both of them a national footprint along with a huge quantity of servers at each one the majority of US data centers as well as Internet service provider headends / POPs .

Read More: http://bigcdn.com/