(Multiple choice) When the OLT main control board CPU is detected to be continuously elevated, the
following possible causes are?

• A.The user logged in illegally
• B.Rogue ONU
• C.Network loops
• D.Cyber attacks

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Max-Forwards fields can be used in S1P messages to solve loop problems and avoid endless packet
forwarding.

• A.Right
• B.wrong

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In the evolution of EPON to 10 G EPON, a smooth transition is achieved at the local level by adding WDM
WDM modules, and ODNs coexist

• A.True
• B.False

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Under the H.248 protocol, if the signaling IP and media IP are both 10. 1 1 100/8, voice gateway is 10. 1 1 1.
When configuring voIP service, the following command is incorrect

• A.Using the command ip address signaling10 in voip mode. 1 1 10010 1 1 1 Configure the signaling IP
• B.Use the if-h248 attributei command to configure interface properties under the voice interface
• C.Use the reset coldstart command under Voice Interface to make the interface property configuration take
  effect
• D.Using the command ip address media10 in voip mode. 1 1 10010 1 1 1 Configure the media IP

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(Radio) The downstream effective bandwidth of the GPON PON port is

• A.2.2G
• B.1.25G
• C.2G
• D.2.5G

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