Which of the following descriptions about Trunk port and Access port is correct?

• A.Access port can only send untagged frames
• B.Access port can only send tagged frames
• C.Trunk port can only send tagged frames
• D.Trunk port can only send untagged frames

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Connection between switches and hosts, which port link type is often used by the switch?

• A.Trunk link
• B.Hybrid link
• C.Access link
• D.Trunk link

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The Backup ports in RSTP may alternatively failed root port.

• A.True
• B.False

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Which of the following statements about the division of OSPF protocol area is wrong?

• A.Only ABR can be used as ASBR
• B.Dividing OSPF areas can reduce the LSDB scale of some routers
• C.The LSDBs in the routers in the same OSPF area are completely consistent
• D.Area 0 is the backbone area, and other areas must be connected to this area

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What is the value of TPID defined by IEEE802.1Q?

• A.0x8100
• B.0x7200
• C.0x9100
• D.0x8200

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