多项选择题
A. multicast routing uses RPF
B. multicast routing is connectionless.
C. In multicast routing， the source of a packet is known.
D. When network topologies change， multicast distribution trees are not rebuilt， but use the originalpath
E. Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destination
多项选择题 WhichtwoofthefollowingCiscorouterplatformssupportMulticastDistributedFast Switching？（）
单项选择题 Which routing protocol best fits these requirements？（） - Supported by multiple router vendors - Requires minimum router CPU and memory resources - Uses a simple routing metric - Supports manual or automatic route summarization
单项选择题 Whatisacriteriaoftheenterprisecompositenetworkmodel？（）