# Carlos Baquero - The Legacy of Peer-to-Peer Systems (Highlights)  ## Highlights - A subsequent algorithm, [Kademlia](https://link.springer.com/chapter/10.1007/3-540-45748-8_5), added simplicity and robustness to content addressable networks. It supported symmetric topologies, used a simple XOR distance metric, and allowed concurrent exploration of routes. Nowadays, variants of Kademlia are used to support BitTorrent, [Ethereum](https://medium.com/@ievstrygul/kademlia-the-p2p-system-behind-ethereum-and-bittorrent-networks-a3d8f539f114) and [IPFS](https://docs.ipfs.tech/concepts/dht/#kademlia). ([View Highlight](https://read.readwise.io/read/01gkt891x0gbzxk1m13c91jgpc)) ^429452271 - Quoting from the Dynamo paper: *"**To meet these stringent latency requirements, it was imperative for us to avoid routing requests through multiple nodes* *..**. Dynamo can be characterized as a zero-hop DHT, where each node maintains enough routing information locally to route a request to the appropriate node directly**."* ([View Highlight](https://read.readwise.io/read/01gkv495ewyj8b5gwxvkf81ccm)) ^429607841