Hi,
I am digging through CentOS networking files and their corresponding man pages and found on the resolv.conf file that resolver routines are reading this file the first time they are invoked by a process. I am trying to visualize this and am thinking that one example would be a web browser sending a http request that causes resolver to read resolv.conf. Anything more realistic than my petty example?
It continues saying the resolver reads /etc/hosts first and then resolv.conf. Isn't the sequence set in nsswitch.conf? If so, which section of nsswitch- hosts, networks or services?

Any application that doesn't come with its own resolver basically. Basic apps like wget, curl or GET could be examples. BTW yours isn't a petty example.


Yes.


Since the system call is gethostbyname and since you'd need to know what host to connect to before you can do anything with a service (port) I'd say the hosts section.