Clarification of Answer by
gan-ga
on
12 Feb 2003 05:01 PST
Hello chameleon911-ga,
Why 64.94.89.146 doesn't resolve:
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IP addresses are mapped to domain names through the Domain Name
System, a network of server computers (called 'DNS servers') scattered
around the globe, which supply this information to any computer on the
Internet which requests it.
For this system to function, the DNS servers must hold records of
which IP's are pointing at which domain names. Two of these records
are:
1. The PTR record - the domain name pointer; the domain name for a
particular IP.
2. The 'A' record - the IP address for a particular domain name.
Looking at:
DNS Stuff:
http://www.dnsstuff.com/
http://www.dnsstuff.com/tools/ptr.ch?ip=64.94.89.146
it would appear that no PTR records exist for this IP.
This could be caused by expiry of the information, or the fact that
the DNS may not yet have been updated for a recent registration -
waiting for a short period may result in the search returning a
result.
How Reverse DNS Works:
http://www.dnsstuff.com/info/revdns.htm
PTR-Records (domain name pointer)
http://www.jhsoft.com/help/rec_PTR.htm
"what is a PTR record"
http://nsupport.elronsoftware.com/support/wiweb.nsf/d7677f83e0e5db7f85256667006f080e/392020300b4337af852569c200783ba7?OpenDocument
How to execute Javascript in your browser:
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Inline javascript, as described in the clarification above, will
automatically run when the page is loaded into your browser, subject
to the following caveats:
1. The browser must be capable of running javascript. Most modern
browsers are; if you think you might be having trouble on this point,
please let me know which browser you are using.
2. In a browser which is capable of running javascript, support for
javascript must be enabled. In Internet Explorer 6 for example, this
can be checked as follows:
- Tools, Internet Options, Security, Custom Settings, (Scroll down..),
Scripting, Active Scripting, Enable, OK.
The code posted above should be saved in a plain text file - not any
form of word-processing package. Notepad on Windows or the Unix tools
vi or elvis are suitable. When you save the file, save it not as
'filename.txt', save it as 'filename.html'. Note that if Windows is
set to hide file extensions, this can result in your unwittingly
saving the file as 'filename.html.txt' - not what you want.
Once you have the HTML code, containing it's embedded, or in-line,
javascript, saved as above, simply loading the file into your browser
(by double-clicking it on a default Windows / IE install) will cause
the javascript to run.
Thank you for asking for clarification - if things are still unclear
at all, please let me know on which points you would like further
clarification.
Best regards,
Gan
