Microbes have their own version of the internet and it is wonderfully explained in this post on PHYS.ORG.
“Creating a huge global network connecting billions of individuals might be one of humanity’s greatest achievements to date, but microbes beat us to it by more than three billion years. These tiny single-celled organisms aren’t just responsible for all life on Earth. They also have their own versions of the World Wide Web and the Internet of Things. Here’s how they work…”
Tom Gilson. Test Bio