IEEE 1905 is a set of rules that helps different devices talk to each other really well. The rules make sure that all devices can understand each other even if they are made by different companies and use different technologies.
Think of it like this: kids from different schools and different countries can all play together in a game of soccer because they all follow the same rules, even if they speak different languages. IEEE 1905 does the same thing for devices that want to work together.
It's like having a special translator who helps everyone understand each other's different languages. So, if you have a phone made by one company and a TV made by another company, they can still talk to each other and work together if they both follow the IEEE 1905 rules.