Here is more information than you want g:
1. Your browser will convert www.xyz.com to http://www.xyz.com on the
assumption that the default protocol you want to use is HTTP. This is a
pretty safe assumption. If you are using another protocol, such as
accessing a local file or doing an ftp access, you aren't typing it directly
in.
Therefore, those are exactly the same and should always react the same.
Either way, your system has to use DNS to look up the IP for www.xyz.com.
2. Typing in xyz.com can be interpreted in different ways by your web
browser. Some of the time, your browser will convert xyz.com to www.xyz.com,
some of the time it will leave it alone. It sort of depends on what
version. More modern versions will leave it alone most of the time.
It used to be that if your domain was xyz.com, the expectation was that
there would be no machine called xyz.com and no IP address for xyz.com.
This has changed over the past few years to make it easier for people to
type in addresses. Now you can usually get an IP when just typing in the
domain name. However, this is up to the domain name service provider, so
some xyz.com addresses will not resolve to anything.
3. If you want to know if there are DNS issues, you should use DNS tools.
There are web sites to help you, there are utilities you can run to help
you, all modern OSes have command line utilities to help you. You are
welcome to ask about our recommendations for your OS.
--
John DeCarlo, My Views Are My Own
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