I don't understand multicodec concept in CIDv1

Hello, I’m learning about CID

In this page https://proto.school/#/anatomy-of-a-cid/03 about CIDv1,
it states

But when we’re trying to read the data itself, how do we know the encoding method used? It could be encoded with CBOR, Protobuf, plain JSON, etc. To solve this issue, CIDv1 introduces another prefix that uniquely identifies the encoding method used.

IPLD use dag-pb (protobuf for what I know). Since protobuf is binary, does that means that CIDv1 are no more human readable text ?

Thanks for further explaination :slight_smile:

ok, I have response in this page : https://proto.school/#/anatomy-of-a-cid/05
sorry for the noise