In a broad sense, the transmission medium that constitutes the wireless local area network wlan does not include? ()

• A.laser
• B.infrared
• C.Rays
• D.Radio wave

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Which state does the 0SPF protocol use to indicate that the adjacency relationship has been established? ()

• A.Down
• B.Attempt
• C.Full
• D.2-way

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The function of the 0SPF hel1o message is ()

• A.Neighbor discovery
• B.Maintain neighbor relations
• C.Synchronize the LSDB of the router
• D.Update LSA. Information

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What are the ACL classifications*

• A.User-defined ACL
• B.Advanced ACL
• C.Layer 2 ACL
• D.Basic ACL

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The configuration information of a certain port of the switch is shown in the figure. Which of the following statements is wrong?

• A.If the VLAN TAG carried in the data frame is 100, the switch will strip off the VLAN TAG and send it out
• B.The port type is Hybrid
• C.If the port receives a data frame without VLAN TAG, the switch needs to add VLAN TAG 100
• D.If the VLAN TAG carried in the data frame is 200, the switch strips off the VLAN TAG

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