單項選擇題Which statement about MPLS TE Fast Reroute （FRR） link protection operation is not true？（）

A.It requires a next-hop backup tunnel.
B.The backup tunnel terminates on the same tail-end router as the primary tunnel.
C.The point of local repair （PLR） swaps the label and pushes the backup label.
D.The restoration time is expected to be under 50 ms.
E.The backup tunnel can have associated bandwidth capacity


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1.單項選擇題Which router or router combination is used to calculate the MPLS traffic engineering tunnel path？（）

A.head-end router and tail-end router
B.middle-point router
C.head-end router
D.tart-end router
E.tail-end router

2.單項選擇題Which Cisco IOS command displays the export VPN route target value of a VRF？（）

A.show ip vrf all
B.show ip vrf route-targets all
C.show ip vrf summary
D.show ip vrf interfaces
E.show ip vrf detail
F.show ip vrf

3.多項選擇題Which three statements about OSPF partial SPF are true？（）

A.If it is triggered by Type 4， all Type 4 LSAs that announce a certain ASBR and all Type 5 and 7 LSAs are processed
B.If it is triggered by Types 5 and 7， all Type 5 and 7 LSAs that contribute to a certain destination are processed.
C.If it is triggered by Type 2， all Type 2 LSAs that contribute to a certain destination are processed.
D.If it is triggered by the change of Type 3， 4， 5， and 7 LSAs.
E.If it is triggered by the change of Type 2， 3， 5， and 7 LSAs

4.多項選擇題Which four statements about NetFlow are true？（）

A.NetFlow records bidirectional IP traffic flow.
B.NetFlow export can be implemented over IPv4.
C.NetFlow export can be implemented over IPv6.
D.NetFlow records multicast IP traffic flow.
E.NetFlow records ingress traffic.
F.NetFlow records egress traffic.

5.單項選擇題Which statement about PIM sparse mode operations is true？（）

A.It does not support all underlying unicast routing protocols like BGP
B.Receivers are registered with RP by their first hop router
C.From the RP， traffic flows down a source tree to each receiver.
D.It supports shared trees only， and assumes all hosts want the multicast traffic
E.Receivers are joined to the shared tree by their local designated router