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DNS query for GTM & LTM based URL's
Thanks Cjunior for your response, it really helps,
Please help me confirm the understanding,
I hit, www.mysite.com --> it goes from LDNS to GTM (SOA) --> I get a response back with LTM VIP,
Now i will connect to the vip direclty, it gives me a page,
now, i am in the application, i will go ahead and click a link within my application within 30 seconds (which is GTM pools TTL), www.mysite.com/report --> I understand, it will again make a DNS query for FQDN, but will pick the answer from cache as this is within TTL value,
Let's say, i stay inactive in the app for 60 seconds, then i try to click www.mysite.com/process --> it will do a DNS query again for FQDN, it will look at LDNS, which no longer have the cached value as TTL expired, it will go to SOA, F5 GTM for resolution, correct?
Conclusion: what i wanted to confirm is, even if i am navigating to different places within my app, every time, it will query DNS for the FQDN,
Thank you very much.
- cjuniorApr 24, 2020
Nacreous
Yes, as you set on app to request an FQDN resource, it will ask for name resolution, to get an Internet Protocol address (IP), where this address could be take from hosts file, caches or DNS recursion queries.
So before request a HTTP resource to a certain server name, it will request a DNS resolution to know where the server address lays to that service.
Regards.
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