When configuring the multicast routing protocol, you need to execute the () routing-enable command first, and then perform the related configuration of the PFIM protocol. (Please fill in the complete command, not abbreviated, and use all lowercase English letters).

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In the RSTP network shown in the figure \. According to the configuration of the SWC in the figure, it can be judged that the type of the E0/1 port of the SWC is (). (Multiple choice)

• A.Preparation port
• B.Designated port
• C.Root port
• D.Edge port

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About OSPF 's ASBR Summary-LSA information description, which of the following is false?

• A.Link State ID indicates the Router ID of ASBR
• B.The Advertising Router fields in the ASBR-Summary-LSA of all areas are the same
• C.Metric indicates that the overhead of ABR to reach the ASBR of OSPF
• D.Advertising Router represents the ABR 's Router ID

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Which of the following about OSPF AS-External-LSA is correct? (Multiple choice)

• A.Net mask is set to all 0
• B.Link State ID is set as the destination network segment address
• C.Advertising Router is set to ASBR Router ID
• D.Use Link State ID and Advertising Router to uniquely identify an AS-External-LSA

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The default value of the ospfdr-prioritye command is 1, and the value range is 0~255.

• A.TRUE
• B.FALSE

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