MCP solved tool calling. A2A solved coordination. What solves transport?

The AI agent ecosystem is experiencing protocol proliferation, similar to earlier computing paradigms. MCP handles tool calls, A2A coordinates tasks, ACP enables lightweight messaging, and ANP manages discovery and identity. Current protocols rely on HTTP, creating a centralization problem behind NAT. The transport layer, addressing peer-to-peer connections, is 18-24 months behind and will likely