More transports coming! IPFS is built on libp2p, and so far all available libp2p transports have been stream-oriented (TCP, Websockets, WebRTC, Onion, QUIC), but different types of transports are in the works: packet-oriented (UDP, Ethernet, WebRTC-unreliable) and store-and-forward.

Apart from that IPFS is built and layered in a way that makes the application layer independent of transport semantics - the network in terms of connections and hosts is abstracted away.