多項選擇題Which two statements about OSPF IPv6 routing are true？（）

A.It requires OSPF version 3.
B.automatically detects neighbors over NHMA interfaces
C.It supports encryption using
D.It uses LSA type 9
E.It uses LSA type 8


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1.多項選擇題What are three common reasons for ATM CRC errors？（）

A.Incorrect VPI and VCI configuration
B.Noise， gain hits， or other transmission problems on the data link equipment
C.ATM cells are dropped due to incorrect ATM routing in the service provider.
D.A faulty or failing ATM interface.
E.Cells are dropped due to traffic policing in the ATM cloud on one or more virtual circuits attached to theATM interface

2.多項選擇題In the Carrier Supporting Carrier （CsC） feature， which two protocols run between CSC-PE and CSC-CE（）.

A.IGP and RSVP
B.EBGPv4 with a sending community
C.IGP and EBGPv4
D.IGP and LDP
E.EBGPv4 with a sending label

3.多項選擇題Which two requirements to deploy 6PE and 6VPE solutions are mandatory？（）

A.MPLS is enabled on the core， distribution， and edge devices.
B.A triple stack is enabled on PE devices.
C.The network has at least six PE devices.
D.A dual stack is enabled on all the P and PE devices in a network.

4.單項選擇題In optical transmission systems， chirped lasers are used for the purpose of：（）.

A.Turning the laser to a specific ITU channel
B.Keeping the signal wavelength "locked" to a specific technology
C.Suppressing FWM and SBS non-linear effects
D.None ofthe above

5.多項選擇題Which three things are the building blocks of the Cisco VPLS architecture？（）

A.VLAN Trunk Protocol （VTP）
B.State Synchronization Protocol （SSP）
C.L2VPN
D.Ethernet Virtual Switch Interface （VSI）
E.Label Distribution Protocol （LDP）

6.單項選擇題What layer of the TMN （telecommunications management network） model does CTM fit into？（）

A.Network management layer
B.Element management layer
C.Business management layer
D.Network element layer

7.單項選擇題Which option is not a valid method to assign the lowest-order 64-bit field of an IPv6 unicast address？（）

A.ARP
B.manual assignment
C.DHCPv6
D.auto-configured based on the 48-bit MAC address
E.auto-generated pseudo-random number

8.多項選擇題Which three protocols use TLVs to carry attributes？（）

A.Cisco Discovery Protocol
B.Label Discovery Protocol
C.Border Gateway Protocol
D.OSPF
E.RIP version 2

9.單項選擇題Assume that the PEs are separated by Multiple P routers.How many labels should the ingress PE push for BPE functionality？（）

A.1
B.None
C.3
D.2
E.It depends on the numbers of hops between the ingress and egress PE