The link aggregation interface can only be used as a Layer 2 interface.

• A.TRUE
• B.FALSE

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Which of the following statements is correct?

• A.The switch works at the physical layer
• B.The router works at the physical layer
• C.The router works at the network layer
• D.The switch works at the network layer

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How many types of data flows with different service levels can be marked based on MPLS labels?

• A.4
• B.2
• C.16
• D.8

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Compared with STP, which of the following port roles are newly defined in RSTP? ()*

• A.Root port
• B.Alternate port
• C.Backup port
• D.Designated port

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The DHCPv6 server supports providing other configuration information such as DNS server address for the host.

• A.True
• B.False

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