Access control is used to limit the traffic rate or block specific traffic based on reachable network routes to meet service management and control needs.

• A.TRUE
• B.FALSE

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Which of the following are migration difficulties? (Choose three.)

• A.Minimizing on services
• B.Carrying out the migration smoothly
• C.Achieving optimal risk prevention
• D.Formulating a complete migration solution

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Which of the following statements regarding border security optimization are true? (Multiple Choice)

• A.The optimization position is usually located at the network edge.
• B.Border security optimization aims to prevent or reduce external network attacks and harm.
• C.Border security optimization aims to achieve secure user access control.
• D.Optimization measures include attack defense technologies, packet filtering, and hardware firewalls.

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Migration rollback is to restore the network state back before the migration.

• A.FALSE
• B.TRUE

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Which of the following formulas is used to calculate availability?

• A.(MTBF + MTTR)/MTBF x 100%
• B.MTTR/MTBF x 100%
• C.MTBF/(MTBF + MTTR) x 100%
• D.MTBF/MTTR x 100%

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