多項選擇題Which three statements are true about Source Specific Multicast？（）

A.Is best suited for applications that are in the one-to-many category.
B.SSM uses shortest path trees only.
C.The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a.
D.There are no RPs to worry about.


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5.單項選擇題You work as a network engineer for the company，you want to configure two BGP speakers to form an EBGP session across a firewall. On the engineer’s network，the firewall always permits TCP sessions that are initiated from the inside network （the network attached to the inside interface of the firewall）. What prerequisite is there for enabling BGP to run on this network？（）

A.EBGP multihop will need to be configured for this to work.
B.This should work with normal BGP peering，with no additional configuration on the BGP speakers or the firewall.
C.The BGP protocol port must be opened on the firewall
D.There is no way to make BGP work across a firewall.