In the broadcast network shown in the figure, OSPF runs on four routers, and they are in the same area and the same network segment. OSPF will automatically elect a DR and a BDR, and the other two routers will become DR other, so as to achieve a better backup effect.

• A.TRUE
• B.FALSE

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The function of Hello message in PIM-SM is? (Multiple choice)

• A.Neighbor capability negotiation
• B.Establish and maintain neighbor relationships
• C.Register with RP
• D.Election network segment BDR

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The ACL configuration of a router is as shown in the figure. Based on the content analysis in the figure, which of the following descriptions is correct?

• A.Traffic in this device from the 192.168.1.0/24 network segment to the host address other than
  10.167.12.1 is not allowed to pass.
• B.Accessing all hosts in the 10.167.12.0/24 network segment through Telnet from the 192.168.1.0/24 network segment is allowed
• C.Accessing all hosts in the 10.167.12.0/24 network segment through remote desktop from the
  192.168.1.0/24 network segment is allowed
• D.Accessing the host at the 10.167.12.1 address through SSH from the 192.168.1.0/24 network segment is denied.

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R1, R2 , R3 , R4 run OSPF , and the area ID is as shown in the figure, then () will generate Type-3 LSA. (Please fill in the device name, such as R1)

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Which of the following protocols support network monitoring and management? (Multiple choice)

• A.SFlow
• B.SNMP
• C.SSH
• D.NetStream

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