Which of the following does not belong to FTTH ODN network component?

• A.ODF
• B.optical splitter
• C.FAT
• D.ONU

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Which of the following statement is correct?

• A.Compared with the shared Hub, a port of LAN Switch can be said that a single collision domain.
• B.LAN Switch doesn't need to identify the MAC address, but it must identify the IP address.
• C.LAN Switch mainly looks up the corresponding IP addresses based on MAC address of the packet, to achieve the forwarding of data packets.
• D.When received the data packet which contains unrecognized MAC address, LAN Switch send back the data packet from the received port directly.

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In the GPON network, ONU_ID must be unique under the same PON port of the OLT.

• A.True
• B.False

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(multiple) command. What are the correct meanings of the three points in ./.profile?

• A.The first point. Indicates execution, with sh
• B.The third point. Before the profile, the .profile is a file name, indicating hidden files.
• C.The second point. Connected to the following /, / indicates the current directory
• D.Third point. Connected to the previous /, indicating the root directory

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What kind of ICMP massage is used by PING command? (Multiple Choice)

• A.ICMP address mask request packet
• B.ICMP timestamp request packet
• C.ICMP Echo Reply packet
• D.ICMP Echo Request packet

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