tomthehero

If 10 users are being served a live video broadcast stream of 1mbps bitrate by a server, does the server require 10mbps bandwidth or is 1mbps enough?

Since the server is serving exactly same data to multiple clients, does it send multiple copies of same packets with different destination addresses or does it send a single copy of a packet with a list of destination addresses?

If the commonly used protocols doesn't support this, are there any not so widely used options?