DNS for IP address lookup

[jrefactors at hotmail.com]

When we type http://www.website.com in the web browser, the ISP will
connect to DNS server for IP address lookup, and return an IP address
to browser, and connect to that web site. Correct sequenece?

What if the user type the ip address of a web site in the web browser,
will still go through DNS server for host name to ip address
conversion?

please advise. thanks!!