In RSTP, you can use the stp root primary command to configure the current device as the root bridge. After configuration, the device priority is automatically ( ), and the device priority cannot be changed.

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When a routing protocol implements route import, routing information can be transferred between different routing protocols.
Which of the following problems may also be caused? (Multiple choice)

• A.Routing loop
• B.Process number conflict
• C.Suboptimal path
• D.Routing black hole

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Which of the following description about MED is correct? (Multiple choice)

• A.MED is an optional non-transitional attribute
• B.The default value of MED is 0
• C.MED can only be transferred within this AS
• D.The default value of MED is 100

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Which of the following description about OSPF is correct?

• A.OSPF itself has no confirmation mechanism, so 0SPP relies on the lower layer protocol, namely TCP confirmation.
• B.OSPF LSA is regularly updated every 30 minutes
• C.OSPF uses the Bellman-Ford algorithm, and each router runs the algorithm independently
• D.OSPF floods an LSU every 5s

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The function of routing protocol priority is to assign different priorities to routes discovered by different protocols, so that when a router learns the same route from different routing protocols at the same time, it can have a selected priority.

• A.TRUE
• B.FALSE

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