(single) MA5600T/MA5680T one-pack loading mode can be uniformly loaded into the OLT device by grouping multiple files into one package file, which can greatly reduce the upgrade complexity of the OLT device. Which of the following options cannot be uniformly loaded by the unified package tool? ?

• A.Target version Main package
• B.Source version upgrade special patch
• C.Post-upgrade patch file
• D.Source version SPH/SPC patch

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(single) Is the following description correct? In an EPON network, a service flow is carried by a gemport.

• A.True
• B.False

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VDSL2 on a pair of twisted pair provides vertically symmetrical/asymmetrical transmission rate, transmission distance of about 3km, the maximum descending rate of 52M (symmetric rates), the maximum upstream rate of 12M (asymmetric rate).

• A.False
• B.True

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(single) Where is the H.248 protocol used for?

• A.MG and MG
• B.between MGC and MG
  Between D.MG and Swich
• C.Between MGC and MGC

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which command can be used to command when configuring the chassis connection?

• A.link add
• B.frame link
• C.frame connect
• D.frame add

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