diff between "option domainname" and "ddns-domainname" ?

[kalyanasundaram S]

thanks simon,
why the host declarations is being updated in dns while using ddns-domainname
why not while using option domain-name

thanks,
  -"kalyan"
> Subject: Re: diff between "option domainname" and "ddns-domainname" ?
> kalyanasundaram S wrote:
> 
> >what is difference between These two
>>   Option domain-name
>>   ddns-domainname.
> 
>>   Option domain-name
> 
> Will be passed to the client if the client requests it.
> 
>>   ddns-domainname.
> 
> Is used to make a fqdn for Dynamic DNS updates but is not passed to the
> client.
> 
> 
> Simon