-----Original Message----- From: Chuck Swiger [mailto:cswi...@mac.com] Sent: Saturday, February 18, 2012 1:04 AM To: Gaurav kansal Cc: bind-users@lists.isc.org Subject: Re: Query Regarding AKAMAI Working Model Hi, Gaurav-- On Feb 17, 2012, at 11:15 AM, Gaurav kansal wrote: > I want to know how AKAMAI works???? They work well. :-) Ya. They work well. That's why, majority of content providers are using them. J > May be this is not the right forum to ask but I am asking this here because AKAMAI heavily depend on its HL-DNS and LL-DNS AND these DNS Servers answer the query based on some input it gets from BGP Routes. They've got a fair amount of documentation publicly available describing their CDN network, pushing updates from origin to their Edge servers, Akamai'zed URL format, determining which Edge servers should be returned for a client request, based on geo location, network location, availability and throughput, failover, and so forth. <http://www.akamai.com/html/technology/products/index.html> http://www.akamai.com/html/technology/products/index.html It's not completely off-topic, but you'd likely do better to ask them directly if you need more info. I search a lot for but didn't find answer for my question. I have few questions about there working model. First is, why they are doing CNAME 4 time for each zone?? For ex: ;; QUESTION SECTION: ;www.cisco.com. IN A ;; ANSWER SECTION: www.cisco.com. 236 IN CNAME www.cisco.com.akadns.net. www.cisco.com.akadns.net. 268 IN CNAME geoprod.cisco.com.akadns.net. geoprod.cisco.com.akadns.net. 206 IN CNAME www.cisco.com.edgekey.net. www.cisco.com.edgekey.net. 11010 IN CNAME www.cisco.com.edgekey.net.globalredir.akadns.net. www.cisco.com.edgekey.net.globalredir.akadns.net. 257 IN CNAME e144.cd.akamaiedge.net. e144.cd.akamaiedge.net. 7 IN A 125.252.232.170 What's the need of doing CNAME 4 times and AKAMAI does this thing for each domain they takes care of. Regards, -- -Chuck
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