There are four main components to phase 2: 1) Add functionality to send “ping” messages over UDP and listen for echo responses, in order to estimate the round trip time to another peer.-- Mandatory 2) Add functionality to respond to ping messages from other peers.-- Mandatory 3) Add functionality to connect to another peer and download a file.--Optional 4) Add functionality to make your peer a file server, so that other peers may connect and download files from you.

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