In the IEEE802.11 standard, which only supports the 2.4G frequency band? (Multiple choice)

• A.802.11n
• B.802.11g
• C.802.11b
• D.802.11a

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In order to implement the FIT AP online, the FIT AP first needs to obtain the IP address of the AC. Which of the following does not include the method for the FIT AP to obtain the AC's IP address?

• A.Multicast mode
• B.DHCP Option mode
• C.Static designation method on AP
• D.Broadcast method

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As shown in the figure, two hosts communicate between VLANs through single-arm routing. When the G0/0/1.2 sub-interface of RTA receives the data frame sent by host B to host A, which of the following operations will RTA perform?

• A.RTA forwards the data directly through the G0/0/1.1 sub-interface
• B.After RIA deletes VLAN tag 20, it is sent out by G0/0/1.1 interface
• C.RTA first deletes the VLAN tag 20, then adds the VLAN tag 10, and then sends it out through the G0/0/1.1 interface
• D.RTA will discard the data frame

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A network engineer prompts the following information when entering the command line:
Error: Unrecognized command found at '^' position. Which statement is correct about this prompt message?

• A.The input command is ambiguous
• B.The parameter type is wrong
• C.The input command is incomplete
• D.Keyword not found

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Regarding the description of the VRRP slave device, which one is correct? (Multiple choice)

• A.When receiving a VRRP message with a priority of 0, the Slave will directly switch to the Master
• B.Slave will respond to the IP packet whose destination IP address is the virtual IP address
• C.Slave will discard IP packets whose destination MAC is the virtual MAC address
• D.When the Slave receives the VRRP packet sent by the Master, it can judge whether the status of the Master is normal

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