Which of the following descriptions of the LSA age field is correct? (Multiple choice)

• A.The unit of LSA age is second, the LS age of LSA in LSDB increases with time
• B.If the LS age of an LSA reaches LSRefreshTime (30min), any router can regenerate an instance of the LSA for this LSA
• C.The unit of LSA age is second, the LS age of LSA in LSDB decreases with time
• D.If the LS age of an LSA reaches LSRefreshTime (30min), the producer of this LSA needs to regenerate an instance of the LSA

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BGP is an inter-domain routing protocol. Which of the following descriptions of this protocol is correct? (Multiple choice)

• A.Support rich routing strategies
• B.Does not support neighbor authentication
• C.Support automatic neighbor discovery
• D.BGP protocol adopts reliable transmission protocol

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Among the matters needing attention in configuring the Stub area, which of the following description is correct?

• A.If an area is configured as a stub area, all routers in the area must be configured with stub area attributes
• B.The backbone area can be configured as a stub area
• C.ASBR can exist in the stub area
• D.The virtual link can traverse the stub area

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If the router-id is configured in both the system view and the BGP view of the router, because the BGP view has a higher priority, BGP uses the router-id in the BGP view.

• A.TRUE
• B.FALSE

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What is the sequence of the VLAN Pool assigning VLANs to the terminal? (Multiple choice)

• A.Terminal access to VAP
• B.The terminal accesses from the divided VLAN
• C.Determine the VLAN Pool and VLAN algorithm bound to the VAP
• D.Assign VLAN to the terminal according to the VLAN algorithm

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