For example, if the latest version of the BLXR protocol is Version 8 with support of Versions 6 and 7, each Relay will know how to convert 6 -> 7, 6 -> 8, 8 -> 7, 7 -> 6. If a Relay receives a message from a Gateway running Version 6 then it will convert the message to Version 8 and broadcast the message of Version 8 across the BDN. Likewise, when another Relay sends that message to a Gateway running Version 6, the Relay will convert the message from Version 8 to Version 6, and send the Version 6 message to the Gateway.