AI Agent Networking in 2026: NAT Traversal, Encrypted Tunnels, and Why MCP Needs a Transport Layer

AI agent networking issues are caused by a lack of transport layer in MCP and A2A protocols, leading to communication problems across different networks. This gap is filled by a session-layer protocol. Engineers should consider implementing a transport layer to enable reliable agent communication. This will help avoid introducing a central server that can cause latency and single points of failure.