Which two combinations are valid PAgP configurations that will set up a PAgP channel？（）

A.On-Passive
B.On-Auto
C.Passive-Active
D.Desirable-Auto
E.Active-Active
F.Desirable-Desirable

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Which information is carried in an OSPFv3 intra-area-prefix LSA？（）

A. IPv6 prefixes
B. link-local addresses
C. solicited node multicast addresses
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Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？（）

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B. The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code.
C. An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.
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You are using VTP version 2 in your network to transport VLAN information between switches. When adding a switch to the network that has been used in the lab previously， you notice that a lot of the existingVLANs have been deleted or replaced with other names. What can you do to prevent this from happeningin the future， without losing all VTP features that you are using today？（）

A.configure a hard-to-guess VTP domain name
B.use a hard-to-guess VTP password
C.use VTP transparent mode
D.implement VTP version 3

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