多項選擇題Which two of these are characteristics of multicast routing？ （）

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


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A. 3600 series
B. 7200 series with NSE-1
C. 7500 series
D. 12000 series

3.單項選擇題What is a criteria of the enterprise composite network model？（）

A. includes all modules needed to meet any network design
B. defines flexible boundaries between modules for scalability requirements
C. clearly defines module boundaries and demarcation points to identify where traffic is
D. requires specific core， distribution， and access layer requirements to match the model

4.單項選擇題What is the first step that you would use Cisco Product Advisor for when selecting a router for an Edge solution？（）

A. determine types of protocols to be supported
B. determine the environment in which the router will be used
C. select the number of WAN ports required
D. select the number of LAN ports required

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