單項(xiàng)選擇題Multicast is being deployed in the network, and only ip pim sparse-dense mode has been configured on all interfaces in the network to support a new video streaming application. No other multicast configuration was applied anywhere in the network. Since enabling multicast, the network monitoring tools show periodic spikes in link utilization throughout the network, even in areas where the video application is not being used. What could be a possible cause?()

A.PIM sparse mode is being used.
B.PIM dense mode is being used.
C.The BGP multicast address family has not been configured.
D.IGMP version 3 is being used.
E.IP PIM neighbor filters have not been applied.


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5.單項(xiàng)選擇題Which statement is correct about an OSPF sham-link?()

A.A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
B.A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
C.A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.
D.A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
E.A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.

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