Can anyone explain the below lines in description ?

Question

You know its love when you memorise her IP number to skip DNS overhead.

Answer 1

When we search for websites we use domain names like www.google.com. We use these because they are easy to remember. Computers don't understand them, the internet uses IP addresses so when you search for google.col your computer connects to a DNS server that will translate google.com into the real IP address of that website. So the joke is that he loves this person so much that hey don't want to wait for the dns server to translate the domain name into an IP address so instead he just memorized the IP address. Does that make sense?

Answer 2

I write down any domain for eg. www.sololearn.com.

My computer asks my local DNS server: "Do you know www.sololearn.com.?".

It says "No, but I know root DNS servers which know com., I will ask them."

Root server knows only authoritative servers for top level domain com. and send their address to my local server.

My local server will ask these authoratitive servers and some of them know authoratitive servers for second level domain sololearn.com.

My local server will ask them and one of them answers that IP for www.sololearn.com is 184.168.221.12.

For next time, my local DNS server will remember the IP without asking others.

Answer 3

TTL - it caused that my servers do not remmember anything :-)

Answer 4

@Michal where placed your local DNS server? May it miss his data and why?