Refer to the following DHCP flowchart, the following statement is correct (). (multiple choice)

• A.The fourth step is to send a unicast message.
• B.The first step is to send a multicast packet.
• C.The second step is to send a unicast message.
• D.The fourth step is to send a broadcast message.
• E.The third step is to send a broadcast message.

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If the EUI-64 address 78BC-FEFF-FFFE-EFAB is calculated based on a MAC address, what is the MAC address

• A.78BC-FEFE-EFAB
• B.78BC-FFFE-EFAB
• C.7ABC-FEFE-EFAB
• D.7ABC-FFFE-EFAB

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When a router is powered on, the router reads the configuration file saved in the default save directory to get itself initialized. If the configuration file does not exist in the default save directory, what does the router use to initialize itself?

• A.Initial configuration file
• B.Current configuration file
• C.New configuration file
• D.Default parameters

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In terms of relative Telnet, SSH which has the following advantages?

• A.to prevent the DNS and IP spoofing
• B.Transfer of data is compressed, so it can accelerate the transmission speed
• C.can encrypt all data transmitted, so as not to be "middle" attack
• D.UDP-based connections, for large-scale use

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The router running OSPF first reaches the FULL state, and then performs LSDB synchronization.

• A.False
• B.True

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