In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic? (Single choice questions).

• A.BSR/RP mechanism
• B.Register mechanism
• C.Join/Prune mechanism
• D.Assert mechanism

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The following statement about the security alliance SA in IPSec is incorrect

• A.SA is uniquely identified by a triple that includes the security parametric reference SPI (Security Parameter Inder), the source IP address, and the security protocol number (AH or ESP)
• B.A two-way SA must exist between IPSec peers to establish an IPSec VPN connection
• C.Use the display ipsec command to view the encryption algorithm used with another IPSec peer, the traffic of interest, and so on.
• D.IPSec only supports encrypting data using symmetric encryption algorithms.

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S-4S supports multi-instance and multi-process, that is, on an IS-IS router, multiple VPN instances can be configured to associate with multiple IS-S processes, the following description of IS-IS multi-instance and multi-process, which are correct?

• A.If an IS-IS router creates multiple IS-IS processes, each process is independent of each other
• B.1 VPN instances can be associated with several different IS-IS processes
• C.1 IS-IS processes can only be associated with 1 VPN instance
• D.1 IS-IS processes can be associated with several different VPN instances

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/R1Jospf1lRL-osp- jarea.2[RLospf-1-arca-0002]network1001310000 As shown in the configuration, the administrator configured OSPF but RI on R1 You cannot learn routes for other routing rings. Then the possible cause is the question).

• A.This router is configured with a different zone ID than its neighbor router's zone ID
• B.This router does not have authentication features configured, but neighbor routers configure authentication features
• C.The declared network address of this router does not match the interface mask
• D.This router does not have an OSPF process number configured

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For the description of firewall security zones, the following statement is correct?

• A.Different interfaces of the firewall can belong to the same security zone
• B.The built-in security zone of the Firewall can be deleted
• C.Different security zones of the firewall, the priority can be the same
• D.The same interface of a firewall can belong to different security zones

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