The media transport protocol commonly used is RTP (RFC3550).
There are various signaling systems used to establish these multi-party conferences.
This approval is usually done by email, but can also be done via telephone or through alternate methods.
In order to get a Domain Validated SSL Certificate you just have to prove that you own the domain by responding to an email or phone call using the information in the WHOIS record of the domain. Your company doesn't have to be validated and no organization name is entered in the certificate. So when should you use Domain Validated SSL Certificates?
For example, if you specify only 1 domain name, you will receive up to 8 email messages.
To validate, you must act on 1 of those 8 messages within 72 hours.
In addition, additional steps are taken by our validation staff to ensure that organizations to which certificates are issued are in fact in control of the domains for which they are requesting certificates, and that they are registered and in good standing with their respective governments.
This additional element is further enhanced with the issuance of EV SSL certificates.