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[多选题]

关于经营杠杆系数，下列说法中正确的是（）。

A.安全边际越大，经营杠杆系数越小

B.在保本图中保本点越向左移动，经营杠杆系数越大

C.边际贡献与固定成本相等时，经营杠杆系数趋近于无穷大

D.经营杠杆系数是利润对销量的敏感度

E.经营杠杆系数表示经营风险程度

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更多“关于经营杠杆系数，下列说法中正确的是（）。A．安全边际越大，…”相关的问题

第1题

Which three statements are true about IP multicast configuration？（）

A. PIM sparse - dense mode and PIM dense mode require an RP on the network.

B. PIM sparse mode and PIM dense mode require an RP on the network.

C. PIM sparse mode interfaces are always added to the multicast routing table in a router.

D. PIM sparse mode and PIM sparse - dense mode require an RP on the network.

E. PIM dense mode interfaces are always added to the multicast routing table in a router.

F. PIM sparse - dense mode acts as PIM dense mode if an RP is not known.

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第2题

简述单播，组播和广播的区别

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第3题

JUNIPER的缺省PIM模式是（）

A．Dense

B．Version1

C．Version2

D．Sparse

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第4题

Which multicast mode does Auto-RP require？（）

A．Link-mode

B． Dense mode

C． Sparse mode

D． Sparse-dense mode

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第5题

Refer to the network of Layer 3 switches in the exhibit. The RPI Multi cast Server only mu

lticasts to hosts connected to multilayer switches 5 and 6. The CMU Multicast Server multicasts to hosts on multilayer switches 1 - 6. Given the number of configuration steps involved, what is the most efficient way to configure the net work while meeting the requirements for multicast data flow？（）

A. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Specify switch 1 as the root for the RPI Multicast Server. Specify switch 2 as the root for the CMU Multicast Server.

B. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode. Leave each multicast server as the root of its own multicast tree.

C. Configure each switch with PIM sparse - dense mode. Configure switch 3 as a ren dezvous point for the RPI multicast stream.

D. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Allow the switches to elect their own root for each multicast tree.

E. Configure each switch with PIM sparse mode.

F. Configure each switch with PIM dense mode.

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第6题

Which two multicast protocol statements are true？（）

A. Sparse mode multicast uses a pull model to send multicast traffic to where it is requested

B. Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic

C. Dense mode multicast requires explicit join messa ges from their members

D. Sparse mode uses reverse path forwarding (RPF) to prune off redundant flows

E. The primary use of sparse mode multicast is for test labs and router performance testing

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