# Identification

A storage node uses a combination of **multi-address** and **Peer ID** to uniquely identify itself. Let's take the following example:

```
/ip4/127.0.0.1/tcp/80/p2p/16Uiu2HAkucvAj8FaUwfMZunCnKB8dGTE4GzX91hVuRV33zLxzZq6
```

* *ip4*: the communication is based on an IPv4 address
* *127.0.0.1*: the IP address for communication
* *tcp*: the communication is using TCP Protocol
* *p2p*: it is a P2P communication
* *16Ui...zZq6*: the node ID

This unique identifier enables a peer to establish a correct connection and verifies the peer's identity and data information.

Please refer to [libp2p-Addressing](https://docs.libp2p.io/concepts/fundamentals/addressing) to learn more on multi-address, and [libp2p-PeerID](https://docs.libp2p.io/concepts/fundamentals/peers) on Peer ID.