Which of the following protocol messages cannot be propagated in an IPSec tunnel by default?

• A.TCP
• B.UDP
• C.ICMP
• D.IGMP

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Which of the following information is involved in the process of the first stage main mode negotiation in IKE v1 negotiation? (Multiple Choice)

• A.Both parties' identity information
• B.DH key exchanges public information
• C.IKE proposal set
• D.IPSec proposal set

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What type of message is the VRRP hello message?

• A.multicast packet
• B.UDP packet
• C.broadcast message
• D.unicast message

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As shown in Figure BFDS for SPF networking scenarios:
1. Run OSPF between FW_A, FW_B and FW_C. All three devices are neighbors.
2. To reach FULL neighbor state, configure OSPF BFD and linkage. BFD finished creating BFD sessions.
Which of the following statements are correct? (Choose two answers)

• A.When a link fails, OSPF convergence and automatic notification BD
• B.Link switch toggles the seconds level
• C.When a link fails, BD first perception, FWA and FWB will soon converge
• D.FWA deal with neighbors Down event, re-route calculation, a new route for the link b

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What are the correct statements about link-group below?

• A.supports remote interface state management
• B.support interface board hot swap
• C.supports interface state management across interface boards
• D.supports interface state management across switches

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