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Questions tagged [dns-lookup]

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Would a preconnection of DNS, TCP and TLS stay open after being used?

Google Developers says that Google Chrome closes a preconnection established with HTML code such as <link rel="preconnect" href="https://example.com"> if the connection isn’t used within 10 ...
2
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1answer
88 views

For SEO which should I use faster performing A records, or can I use CNAME?

It occurs to me, that hosting a website on www.domain.com will result in duplicate, unnecessary DNS lookups if www is a CNAME and not an A(AAA) Record. If the CNAME points to another CNAME, things ...
2
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1answer
173 views

Server wait period after DNS lookup is way too slow

I'm trying to optimize the speed of my portfolio site as much as possible, which considering its a static website shouldn't take much. I'm using cloudflare to manage my DNS, DigitalOcean's droplet ...
4
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1answer
968 views

What is the maximum practical TTL

I'm just curious to know what the maximum practical TTL value is for an A entry. Somewhere I found the TTL value can be as high as 99,999,999 seconds, about 3.1 years, but simply that would not be ...
3
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1answer
284 views

Default Webpage Not Showing Even After 72 Hours of DNS Update

Recently, I opened an unmanaged vps account with a2hosting. I have installed webuzo on my account to manage it. To proceed, I added an addon domain in my hosting account and updated the DNS entries ...
2
votes
1answer
773 views

Why does DNS lookup take more than 6 seconds?

I am running a photography website for my girlfriend, and currently trying to improve the site's loading speed. It is a photography website, and thus many images are loaded, which makes it a little ...
1
vote
1answer
110 views

Does domain aliasing affect performance or SEO?

I have checked my domain in http://ipinfo.info/html/ip_checker.php It is showing the website is having two IPs (Aliasis) like 54.xx.xx.xx & 103.xx.xx.xx. Checked few popular websites and noticed ...
2
votes
3answers
324 views

About Nslookup Results

When I try to resolve 113.181.205.189 and 203.148.85.74, I get localhost. and HM-DC-BS-BIG. results: nslookup 113.181.205.189 Non-authoritative answer: 189.205.181.113.in-addr.arpa name = ...
2
votes
1answer
66 views

What should be domain name A-record for VPS server's main domain?

While updating the child name servers of the main domain of my VPS server I mistakenly changed the A-records to the server's IP. Will that have any effect of the name servers? I found this question ...
4
votes
2answers
310 views

Should <link ref=“dns-prefetch”> tag be placed as high as possible in <head> website?

I'm implementing the new dns-prefetch tag for my web application and I wonder where I should place it in the <head> tag? Should I place it as the first tag in <head> so that browser ...
2
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2answers
2k views

How to reduce DNS lookups?

It takes about 20-120 milliseconds for DNS (Domain Name System) to resolve IP address for a given hostname or domain name and the browser cannot do anything until the process is properly completed. ...