Peer-to-peer (P2P) network question:

Suppose a file of size 50 MBytes is to be distributed from a server to 10 hosts over the Internet. The server has an upload/download speed of 50 Mbps. Each of hosts 1-5 has an upload speed of 5 Mbps and a download speed of 20 Mbps. Each of hosts 6-10 has an upload/download speed of 10 Mbps.

(a) Briefly discuss an important impact of the peer-to-peer model on modern networks.

(b) In the above scenario, calculate a lower bound on the time to complete the file transfer assuming: (i) client-server model; (ii) peer-to-peer model.