國立臺灣大學電機工程學系Huang, PollyPollyHuang2006-09-282018-07-062006-09-282018-07-062003http://ntur.lib.ntu.edu.tw//handle/246246/2006092815521204want to send info to a group of people allows you to send one packet and let the network make copies to everyone supports anonymous addressing don’t have to keep track of individual users don’t worry about changes in group membership but: may not get particular users all users may not need all info sent to the group ex. data loss and repair some applications want to know how many or who are in the group?application/ppt190464 bytesapplication/vnd.ms-powerpointzh-TWlearning objecthttp://ntur.lib.ntu.edu.tw/bitstream/246246/2006092815521204/1/net-protocol-mcast-overview.ppt